Chapter 10 : The Patent Act,1970

CHAPTER X: AMENDMENT OF APPLICATIONS AND SPECIFICATIONS

This chapter explains how and when you can change your patent documents after you’ve filed them.

Section 57: Amendment of application and specification… before Controller

• (1) What it says: …the Controller may, upon application… by an applicant… or by a patentee, allow the application… or the complete specification… to be amended subject to such conditions… as the Controller thinks fit…
  • In plain English: At any time, the patent applicant or the patent owner (patentee) can request to amend their application or the granted patent. The Controller has the power to allow this, and can impose conditions (e.g., “I’ll allow this change if you also make this other clarification”).
• (1) Proviso: …the Controller shall not pass any order allowing or refusing an application to amend… while any suit before a court for… infringement… or… revocation… is pending…
  • In plain English: This is a “pause” button. If the patent is currently being disputed in court (either you’re suing for infringement or someone is trying to revoke your patent), the Controller must not make a decision on any amendment request.
  • The court (the High Court) gets to decide on amendments in that situation, not the Controller. (See Section 58).
• (2) What it says: Every application for leave to amend… shall state the nature of the proposed amendment, and shall give full particulars of the reasons for which the application is made.
  • In plain English: You can’t just send in a new version. You must file a formal request that clearly shows the changes (e.g., “delete this sentence, add this word”) and explains in detail why you need to make the change (e.g., “to correct a typing error,” “to clarify the scope of Claim 1,” etc.).
• (3) What it says: Any application for leave to amend… made after the grant of patent and the nature of the proposed amendment may be published.
  • In plain English: If you try to amend your patent after it’s already been granted, the Controller may publish the details of your proposed changes for the public to see.
• (4) What it says: Where an application is published… any person interested may… give notice to the Controller of opposition thereto…
  • In plain English: If the Controller publishes your proposed amendment (under sub-section 3), any member of the public (like a competitor) gets a chance to oppose your amendment.
  • They can file an opposition, and the Controller must hear both sides before deciding whether to allow the change.
  • Real-world example: You try to amend a claim to correct a “typing error” that actually makes your claim much broader. Your competitor sees this publication and files an opposition, arguing that your change is not a correction and is illegal.
• (5) What it says: An amendment… of a complete specification may be, or include, an amendment of the priority date of a claim.
  • In plain English: A change to your specification can sometimes result in a change to the priority date of a specific claim. This is complex, but if you delete information from a claim that was in your original provisional, its priority date might “fall back” to the later, complete filing date. This section confirms that this is a possible outcome of an amendment.
• (6) What it says: The provisions of this section shall be without prejudice to the right of an applicant… to amend his specification… to comply with the directions of the Controller issued before the grant…
  • In plain English: This clarifies that this section (which is mostly for voluntary amendments) doesn’t interfere with the normal amendment process during examination.
  • When an examiner gives you an Examination Report (FER) with objections, you have a right to amend your application to overcome those objections. That is a separate, standard process.

Section 58: Amendment of specification before High Court

This section deals with amendments during a court case.

• (1) What it says: In any proceeding before the Appellate Board or the High Court for the revocation of a patent, the… Board or… High Court… may… allow the patentee to amend his complete specification…
  • In plain English: You are in the High Court. A competitor is trying to revoke your patent. They find a piece of prior art that invalidates your main claim (Claim 1).
  • Instead of just revoking your entire patent, the High Court can allow you to amend it right there in the courtroom (e.g., to delete Claim 1 and save the rest of your patent).
• (1) What it also says: …if… the… Board or the High Court decides that the patent is invalid, it may allow the specification to be amended… instead of revoking the patent.
  • In plain English: The judge says, “As written, your patent is invalid. However, I will give you a chance to amend it to make it valid, and if you do so to my satisfaction, I will not revoke it.” This is a lifeline for patentees.
• (2) What it says: …the applicant shall give notice of the application to the Controller, and the Controller shall be entitled to appear and be heard…
  • In plain English: Even when the case is in the High Court, you must still notify the Controller of the proposed amendment. The Controller (as an expert on patent law) has the right to show up in court and give the judge his opinion on whether the amendment should be allowed.
• (3) What it says: Copies of all orders of the… Board or the High Court allowing… to amend… shall be transmitted… to the Controller who shall… cause an entry thereof… to be made in the register.
  • In plain English: After the High Court approves the amendment, the order is sent to the Patent Office. The Controller then officially updates the public register to show that the patent has been amended.

Section 59: Supplementary provisions as to amendment of application or specification

This is the most important section on amendments. It defines what is allowed and what is forbidden.

• (1) What it says: No amendment… shall be made except by way of disclaimer, correction or explanation…
  • In plain English: You can only amend your patent for one of three reasons:
    • Disclaimer: To give up or narrow the scope of a claim. (e.g., “I claim a metal chair” -> “I claim an aluminum chair”).
    • Correction: To fix an obvious mistake, like a typo or a grammatical error (e.g., “a 10mm bolt” -> “a 10cm bolt” when the drawings clearly show 10cm).
    • Explanation: To make something clearer that was already there, but perhaps badly worded, without changing its actual meaning.
• (1) What it also says: …and no amendment… shall be allowed, except for the purpose of incorporation of actual fact…
  • In plain English: Any amendment (especially a correction) must be to fix an error and reflect an “actual fact.” You can’t use “correction” as an excuse to add new, unrelated information.
• (1) The BIG Prohibitions: …and no amendment of a complete specification shall be allowed, the effect of which would be that…
  • (Prohibition 1): …the specification as amended would claim or describe matter not in substance disclosed… in the specification before the amendment…
    • In plain English (THE “NEW MATTER” RULE): You CANNOT add new subject matter. Your patent is “frozen” at your filing date. You can’t add a new feature or improvement that you thought of after you filed.
    • Real-world example: You file a patent for a bicycle with special brakes. During examination, you cannot amend the application to add “and a new electric motor.” The motor is “new matter” and would have to be a new patent application.
  • (Prohibition 2): …any claim… as amended would not fall wholly within the scope of a claim… before the amendment.
    • In plain English (THE “BROADENING” RULE): You CANNOT make your claims broader than they were when you filed. You can only make them narrower or keep them the same.
    • Real-world example: Your original claim is for an “aluminum chair.” You cannot amend this to “a metal chair” (because that is broader—it includes steel, iron, etc.). You can amend it to “an aluminum chair with a red cushion” (that is narrower).
• (2) What it says: Where… any amendment… is allowed… (a) the amendment shall… be deemed to form part of the specification… (b) the fact that the specification… has been amended shall be published… (c) the right of the applicant… to make amendment shall not be called in question except on the ground of fraud.
  • In plain English: Once an amendment is allowed:
    • (a) It is officially part of the patent, as if it were there from the beginning.
    • (b) The Patent Office must publish the fact that the patent was amended.
    • (c) This is a legal shield. Once an amendment is allowed, no one can challenge it in court unless they can prove you committed fraud to get it (e.g., you lied to the Controller).
• (3) What it says: In construing the specification as amended, reference may be made to the specification as originally accepted.
  • In plain English: If a judge is trying to understand the meaning of an amended patent (e.g., in an infringement case), they are allowed to look at the original, un-amended version to understand the context and what the inventor originally intended.