Chapter 3 : The Patent Act,1970

This part of the guide explains the rules for filing a patent application in India. It covers who is allowed to file, what forms are needed, and the critical information you must provide about your invention.

CHAPTER III: APPLICATIONS FOR PATENTS

Section 6: Persons entitled to apply for patents

This section lists who has the legal right to file a patent application.

(1) What it says: …an application for a patent for an invention may be made by any of the following persons…
- In plain English: Not just anyone can file a patent. It must be one of the following people:
(a) What it says: by any person claiming to be the true and first inventor of the invention;
- In plain English: The actual inventor(s) who came up with the idea.
- Real-world example: Priya and Raj co-found a startup and invent a new software algorithm. As the “true and first inventors,” they can file a patent application in their own names.
(b) What it says: by any person being the assignee of the person claiming to be the true and first inventor in respect of the right to make such an application;
- In plain English: A person or company who has been legally given (or “assigned”) the rights to the invention by the inventor.
- Real-world example: A scientist works for a pharmaceutical company. Her employment contract states that any inventions she makes are automatically “assigned” to the company. When she invents a new drug, the company (as the “assignee”) files the patent application, not the scientist herself.
(c) What it says: by the legal representative of any deceased person who immediately before his death was entitled to make such an application.
- In plain English: If the inventor (or the assignee) dies before they can file the patent, the person legally in charge of their estate (their “legal representative,” like an executor) can file it for them.
- Real-world example: An independent inventor creates a new device but dies in an accident before filing the patent. The executor of his will (his “legal representative”) can file the patent application on behalf of his estate, ensuring his heirs can benefit from it.
(2) What it says: An application under sub-section (1) may be made by any of the persons referred to therein either alone or jointly with any other person.
- In plain English: The application can be filed by one person/company or by multiple people/companies together.
- Real-world example: If two people invent something together, they file “jointly.” Or, if an inventor (Priya) and a company (TechCorp) own the rights 50/50, they can file the application together as “Priya and TechCorp.”

Section 7: Form of application

This section outlines the basic rules for the application itself.

(1) What it says: Every application for a patent shall be for one invention only and shall be made in the prescribed form and filed in the patent office.
- In plain English: You must follow two main rules:
  1. One Invention per Application: Your application can’t bundle unrelated ideas.
  2. Use the Right Forms: You must use the official government forms (e.g., “Form 1”) and file them at the official Patent Office.
- Real-world example: You invent a new type of bicycle tyre and a new smartphone app. You must file two separate patent applications. You cannot put them both in one application.
(1A) What it says: Every international application under the Patent Cooperation Treaty…designating India shall be deemed to be an application under this Act…
- In plain English: If you file an “international application” (under the Patent Cooperation Treaty, or “PCT”) and select India as one of the countries, that single filing is treated as your initial Indian application.
- Real-world example: An inventor in Germany files one PCT application and “designates” the USA, Japan, and India. This action is treated as if they filed an application in India on that same day, securing their “priority date.”
(1B) What it says: The filing date of an application referred to in sub-section (1A)… shall be the international filing date accorded under the Patent Cooperation Treaty.
- In plain English: For a PCT application, the official filing date in India is the “international filing date” you were given when you first filed the PCT application.
- Real-world example: If the German inventor filed their PCT application on March 1, 2024, their official Indian filing date is March 1, 2024, not the later date when they submit their national forms to the Indian Patent Office.
(2) What it says: Where the application is made by virtue of an assignment… there shall be furnished… proof of the right to make the application.
- In plain English: If you are not the inventor and are filing as the “assignee,” you must provide a legal document (like a “Deed of Assignment” or Form 1) signed by the inventor that proves you have the right to file.
- Real-world example: When the pharma company from Section 6(b) files its application, it must attach a copy of the employment agreement or a specific form signed by the scientist, proving the company legally owns the invention.
(3) What it says: Every application under this section shall state that the applicant is in possession of the invention and shall name the person claiming to be the true and first inventor…
- In plain English: The application form has two key declarations:
  1. The applicant must state, “I (or we) am in possession of this invention.”
  2. The applicant must clearly name the actual inventor(s). If the applicant isn’t the inventor (like the company), they must declare that they believe the person named is the true inventor.
- Real-world example: The application form (Form 1) has a specific section: “Declaration by the Applicant(s)” and another: “Declaration by the Inventor(s).” This ensures the real inventor is always named, even if a company owns the patent.
(4) What it says: Every such application (not being a convention application or an application filed under the Patent Cooperation Treaty…) shall be accompanied by a provisional or a complete specification.
- In plain English: When you file a new, first-time application in India, you can’t just file the forms. You must attach a document that describes your invention. You have two choices:
  1. Provisional Specification: An initial, less formal description (like an early draft) to secure a filing date quickly.
  2. Complete Specification: The full, final, highly detailed technical document with claims.
- Real-world example: You have a new idea on January 1st. You can rush to the Patent Office and file a 5-page “Provisional” to get that Jan 1st date. You then have 12 months to prepare and file the 50-page “Complete” specification.

Section 8: Information and undertaking regarding foreign applications

This is a very important rule. It forces you to be transparent with the Indian Patent Office about any other patent applications you’ve filed for the same invention in other countries.

(1) What it says: Where an applicant… is prosecuting… an application for a patent in any country outside India… he shall file along with his application or subsequently…
- In plain English: If you are applying for a patent in India and also applying for the same invention in other countries (e.g., USA, China, Europe), you must tell the Indian Patent Office about it. You must provide:
(a) What it says: a statement setting out detailed particulars of such application; and
- In plain English: A list (on a specific form called “Form 3”) of all the other countries you’ve applied in, their application numbers, and their filing dates.
- Real-world example: You file in India. You must also submit a Form 3 that says: “I have also filed for this invention in: 1. USA, App No. 123/456, filed on [Date]; 2. European Patent Office, App No. 789/012, filed on [Date].”
(b) What it says: an undertaking that, up to the date of grant… he would keep the Controller informed in writing, from time to time, of detailed particulars…
- In plain English: You must make a formal promise (an “undertaking”) that you will keep this list updated. If you file in a new country (say, Japan) six months later, you must update the Indian Patent Office with that new information.
- Real-world example: You promise to inform the Controller of “any and all updates” to your foreign filings until your Indian patent is either granted or refused.
(2) What it says: …the Controller may also require the applicant to furnish details… relating to the processing of the application in a country outside India…
- In plain English: The Indian patent examiner can, at any time, send you a notice demanding, “Show me what the US patent examiner said about your application.” You must then provide copies of the “Examination Reports” or other documents from those foreign patent offices.
- Real-world example: The Indian examiner can use the US examiner’s report to find new “prior art” (evidence that the invention isn’t new) and use it to object to your Indian application. Honesty and transparency are mandatory.

Section 9: Provisional and complete specifications

This section explains the critical 12-month relationship between a “provisional” and a “complete” specification.

(1) What it says: …an application… accompanied by a provisional specification, a complete specification shall be filed within twelve months… and if the complete specification is not so filed, the application shall be deemed to be abandoned.
- In plain English: If you file a provisional application, you have exactly 12 months from that filing date to file your complete specification. If you miss this deadline (even by one day), your application is considered “abandoned” (dead) and you lose your filing date.
- Real-world example: You file a provisional on March 1, 2024. You must file your complete specification by March 1, 2025. This 12-month period gives you time to perfect the invention, run experiments, and write the full, detailed document.
(2) What it says: Where two or more applications… are accompanied by provisional specifications in respect of inventions which are cognate… he may allow one complete specification to be filed…
- In plain English: If you file multiple provisional applications for inventions that are closely related (e.g., an improvement on the first idea), the Controller can let you file one single complete specification that covers all of them.
- Real-world example: You file a provisional for a new type of water bottle in January. In March, you file another provisional for a new “smart lid” for that same bottle. The Controller can agree these are “cognate” (related) and let you file one “complete” application covering both the bottle and the lid.
Proviso: …the period of time specified under sub-section (1) shall be reckoned from the date of filing of the earliest provisional specification.
- In plain English: When you combine multiple provisionals, the 12-month deadline for filing the “complete” is timed from the earliest (first) provisional application.
- Real-world example: In the case above, your first provisional was in January and the second was in March. Your 12-month deadline to file the one complete application is 12 months from the January date, not the March date.
(3) What it says: …an application… accompanied by a specification purporting to be a complete specification, the Controller may… direct that such specification shall be treated… as a provisional specification…
- In plain English: If you file a “complete” specification but then realize you need more time to add data, you can (within 12 months) request the Controller to downgrade your complete spec and “treat it as a provisional.”
- Real-world example: You file a complete application on July 1, 2024. In September, you have a breakthrough. You can ask the Controller to treat the July 1 filing as a “provisional,” which gives you until July 1, 2025, to file a new complete application that includes your new breakthrough data.
(4) What it says: …the Controller may… cancel the provisional specification and post-date the application to the date of filing of the complete specification.
- In plain English: If you file a provisional and then (within 12 months) file your complete, you can ask the Controller to cancel the provisional and make your official filing date the date you filed the complete spec.
- Real-world example: You file a weak provisional on Feb 1. You file a very strong complete on Nov 1. You later find out someone else published a similar idea on Feb 15. To avoid your weak provisional being compared to that, you “post-date” your application to Nov 1. You lose your early Feb 1 date, but your application is now only judged against things published before Nov 1.

Section 10: Contents of specifications

This is one of the most important sections. It defines what must be in your patent document for it to be valid.

(1) What it says: Every specification… shall describe the invention and shall begin with a title sufficiently indicating the subject-matter…
- In plain English: Every specification (provisional or complete) must have a clear title that says what the invention is about and must include a description of it.
- Real-world example: A bad title: “My Great Idea.” A good title: “A Method for Secure Data Transmission Using Quantum Encryption.”
(2) What it says: …drawings may, and shall, if the Controller so requires, be supplied… and any drawings so supplied shall… be deemed to form part of the specification…
- In plain English: You can include drawings if they help explain the invention. If the invention is a physical object or process, the Controller will require you to add drawings. They are a formal part of the patent.
- Real-world example: If you invent a new type of engine, your application is almost meaningless without detailed diagrams and flowcharts. These drawings are legally part of the patent.
(3) What it says: …the Controller considers that an application should be further supplemented by a model or sample… such model or sample shall not be deemed to form part of the specification.
- In plain English: The Controller can ask you to provide a physical model or a sample of your invention, but this is not considered part of the official written document. This is very rare.
- Real-world example: If you patent a new type of “glow-in-the-dark” paint, the Controller might ask for a small sample to verify its properties.
(4) What it says: Every complete specification shall—
- In plain English: Your final, “complete” specification has four mandatory parts:
(a) What it says: fully and particularly describe the invention and its operation or use and the method by which it is to be performed;
- In plain English: This is the “sufficiency” requirement. You must describe your invention in so much detail that another person with “average skill” in your field could read your document and rebuild your invention without having to experiment or guess.
- Real-world example: If you invent a new cake recipe, you must list all ingredients with exact measurements and all steps (e.g., “bake at 180°C for 25 minutes”) so another baker can make the exact same cake.
(b) What it says: disclose the best method of performing the invention which is known to the applicant…
- In plain English: You cannot keep a “trade secret” and get a patent. You must tell the public the best way you know of to make your invention work.
- Real-world example: You know two ways to make your new chemical. Method A is 70% efficient. Method B is 95% efficient. You must describe Method B in your application, even if it’s more complex.
(c) What it says: end with a claim or claims defining the scope of the invention for which protection is claimed;
- In plain English: This is the most important part of the patent. The “claims” are a set of numbered sentences at the end that define the exact legal boundaries of your monopoly.
- Real-world example: A claim might say: “1. A chair, comprising: a seat, four legs, and a backrest, wherein the backrest is attached to the seat via a flexible spring mechanism.” Anyone who makes or sells a chair with all those features infringes your patent.
(d) What it says: be accompanied by an abstract to provide technical information on the invention:
- In plain English: You must include a short summary (an “abstract”) of the invention (usually under 150 words) so other people can quickly read it and understand what your invention does.
- Real-world example: “An abstract for a new solar panel, describing its unique layers of silicon and perovskite, which allow it to capture a wider spectrum of light, increasing efficiency by 20%.”
(4) Proviso (ii): if the applicant mentions a biological material in the specification which… is not available to the public, the application shall be completed by depositing the material to an international depository authority…
- In plain English: If your invention uses a new micro-organism (like a bacteria or yeast) that you created and that nobody else has, you can’t just describe it. You must deposit a physical sample in a special, recognized bank (an “ID A”) under the Budapest Treaty.
- Real-world example: A biotech company invents a new yeast strain that produces biofuels. They must deposit a sample of this yeast at an IDA (like the MTCC in India) before or on the date they file their patent.
(4) Proviso (ii)(D): disclose the source and geographical origin of the biological material in the specification…
- In plain English: To prevent “bio-piracy,” you must state where you got the biological material you used.
- Real-world example: If you isolated your new bacteria from soil in a national park, you must declare: “The biological material was sourced from soil collected in the Nilgiri Biosphere Reserve, Tamil Nadu, India.”
(4A) What it says: In case of an international application designating India, the title, description, drawings, abstract and claims filed with the application shall be taken as the complete specification…
- In plainEnglish: For a PCT (international) application, the set of documents you filed internationally (your description, claims, etc.) is accepted by India as your official “complete specification.”
(5) What it says: The claim or claims… shall relate to a single invention, or to a group of inventions linked so as to form a single inventive concept, shall be clear and succinct and shall be fairly based on the matter disclosed in the specification.
- In plain English: This sets three rules for your claims:
  1. Unity of Invention: All claims must be for one invention (or closely linked parts of one concept).
  2. Clear and Succinct: They must be written clearly, not be vague or confusing.
  3. Fairly Based: Your claims cannot “claim” more than what you’ve actually described in the specification.
- Real-world example: If your description only talks about a new bicycle, your claims can’t suddenly say you own the rights to all “two-wheeled vehicles,” as that would include motorcycles, which you never described.
(6) What it says: A declaration as to the inventorship of the invention shall… be furnished…
- In plain English: You must file a specific form (Form 5) that officially declares who the “true and first inventor(s)” are.
- Real-world example: This is a simple declaration signed by the applicant that says: “I declare that the true and first inventor is Dr. Ramesh Gupta.”
(7) What it says: …a complete specification filed after a provisional specification may include claims in respect of developments of, or additions to, the invention…
- In plain English: Your complete specification can be more detailed than your provisional. You can include claims for improvements you made during the 12-month gap, as long as they are logical “developments or additions” to the original idea.
- Real-world example: Your provisional describes a new type of water filter. In the 12 months, you also invent a special alarm that beeps when the filter is dirty. Your complete specification can include claims for the filter and claims for the new alarm, as it’s a development of the original invention.

Section 11: Priority dates of claims of a complete specification

This section is one of the most important in the entire Act. A “priority date” is your invention’s legal “birthday.” It’s the date against which your invention’s “newness” (novelty) is judged. Any publication, sale, or public use before this date can kill your patent. Any publication after this date cannot.

(1) What it says: There shall be a priority date for each claim of a complete specification.
- In plain English: Every single “claim” (the numbered sentences at the end of your patent) gets its own priority date. It’s possible for Claim 1 to have one priority date and Claim 5 to have a different, later priority date.
(2) What it says: Where a complete specification is filed in pursuance of a single application accompanied by… a provisional specification… and the claim is fairly based on the matter disclosed in the… provisional… the priority date of that claim shall be the date of the filing of the… provisional specification.
- In plain English: This is the most common scenario. If you filed a provisional application first (e.g., on Jan 1) and then a complete application later (e.g., on Oct 1), your claims get the earlier Jan 1 date… but only if the idea in the claim was properly described (“fairly based”) in that first provisional document.
- Real-world example:
  1. Jan 1: You file a provisional describing “a chair made of wood.”
  2. Oct 1: You file a complete spec.
  3. Claim 1: “A chair made of wood.” This claim is “fairly based” on the provisional. Priority Date: Jan 1.
  4. Claim 2: “A chair made of metal.” This was not in the provisional. Priority Date: Oct 1.
(3) What it says: Where the complete specification is filed… in pursuance of two or more applications accompanied by [provisional] specifications…
- In plain English: This handles the scenario where you filed multiple provisional applications (e.g., one for an idea, one for an improvement) and are combining them into one complete application.
(a) What it says: …and the claim is fairly based on the matter disclosed in one of those specifications, the priority date… shall be the date of… that specification;
- In plain English: If a claim is based only on the first provisional, it gets the first date. If it’s based only on the second provisional, it gets the second date.
- Real-world example:
  1. Jan 1 (P1): You file a provisional for “a new water bottle.”
  2. Apr 1 (P2): You file another provisional for “a new type of lid for a water bottle.”
  3. Dec 1: You file one complete spec.
  4. Claim 1: “A water bottle…” (from P1). Priority Date: Jan 1.
  5. Claim 2: “A lid for a bottle…” (from P2). Priority Date: Apr 1.
(b) What it says: …partly in one and partly in another, the priority date… shall be the date… of the specification of the later date.
- In plain English: If a single claim relies on information from both provisional applications to make sense, it gets the priority date of the later provisional.
- Real-world example: In the same case:
  1. Claim 3: “A water bottle combined with a new lid…” This claim needs both P1 (for the bottle) and P2 (for the lid).
  2. Priority Date: Apr 1 (the later date, when the full inventive concept was complete).
(3A) What it says: Where a complete specification based on a previously filed application in India has been filed within twelve months… the priority date… shall be the date of the previously filed application…
- In plain English: This allows you to file a new complete application and claim priority from a previous complete application filed in India within the last 12 months (similar to how a “convention application” works, but domestically).
- Real-world example: You file a complete patent application in India on May 1, 2024. You make an improvement and file a new complete application on Oct 1, 2024, claiming priority from the May 1 application. The claims from the first application keep the May 1 priority date.
(4) What it says: Where the complete specification has been filed in pursuance of a further application made by virtue of… section 16… the priority date… shall be the date of the filing of that specification in which the matter was first disclosed.
- In plain English: This is for “divisional applications” (when the patent office forces you to “divide” one application into two). This rule ensures the new “child” application keeps the original “parent” application’s priority date.
- Real-world example: You file one application for “a new car engine and a new car seat.” The examiner says this is two inventions (violating Sec 7) and makes you file a “divisional” application for the seat. This new application for the seat still gets the priority date of your original car engine/seat application.
(5) What it says: Where… any claim… would… have two or more priority dates, the priority date… shall be the earlier or earliest of those dates.
- In plain English: This is a general “tie-breaker” rule. If a claim is broad enough that it could be “fairly based” on matter from several different provisionals, it is granted the earliest possible valid date.
(6) What it says: In any case to which sub-sections (2), (3), (3A), (4) and (5) do not apply, the priority date… shall be the date of filing of the complete specification.
- In plain English: This is the default rule. If you don’t file a provisional, don’t claim priority from another application, and just file a “complete specification” straight away, your priority date is the date you filed it.
- Real-world example: You file your complete specification on June 10. Your priority date is June 10.
(7) What it says: The reference to the date of the filing… shall, in cases where there has been a post-dating… be a reference to the date as so post-dated…
- In plain English: This links back to Section 9(4). If you choose to “post-date” your application (cancel your provisional and take the later date of your complete spec), then that new, later date becomes your priority date for all purposes.
(8) What it says: A claim… shall not be invalid by reason only of… (a) the publication or use of the invention… on or after the priority date… or (b) the grant of another patent which claims the invention… of the same or a later priority date.
- In plain English: This is a crucial protection. It means:
  1. You can’t be “prior art” against yourself. If your priority date is Jan 1, you are free to publish an article or give a speech about your invention on Feb 1 without it being used to invalidate your patent.
  2. Someone else who files after you (or on the same day) can’t be used to block your patent. You were first.
- Real-world example: Your priority date is Jan 1. A competitor publishes a similar idea on Jan 15. That competitor’s publication cannot be used to stop you, because your legal “birthday” (Jan 1) came first.