Rules 29 explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Rules 29 to 33 deal with the second kind of anticipation objection under section 13, where a claim of the applicant's complete specification is already claimed in another specification, and with the related case of potential infringement. They say what the applicant is told, how long the Controller may postpone grant, how a hearing and an amendment work, and the exact wording of the reference the Controller may direct to be inserted after the claims.
If a claim is claimed in any claim of another specification falling within section 13(1)(b), the applicant is informed and may amend (rule 29(1)). If the specification is otherwise in order, the Controller may postpone the grant and allow two months to remove the objection (rule 29(2)). A hearing follows on request, or if the objection is not removed in the two months, on at least ten days' notice (rule 30). The Controller may direct a reference to the other specification to be inserted after the claims in a prescribed form (rules 30 and 31). Potential infringement is handled by the same procedure (rule 32), with the form of reference in rule 33.
Rule 29: procedure in case of anticipation by prior claiming
Prior claiming is dealt with in clause (b) of section 13(1). For the Act, see our article on sections 18-20 of the Patents Act, 1970 and our article on section 13 (search for anticipation).
Sub-rule (1). When it is found that the invention so far as claimed in any claim of the complete specification is claimed in any claim of any other specification falling within clause (b) of section 13(1), the applicant shall be so informed and shall be afforded an opportunity to amend the specification.
Sub-rule (2). If the applicant's specification is otherwise in order for grant and an objection under clause (b) of section 13(1) is outstanding, the Controller may postpone the grant of the patent and allow a period of two months for removing the objection.
The difference from rule 28 is the source of the objection: rule 28 is about a document that published the claimed invention, while rule 29 is about another specification that claims it. See our article on rule 28 for the prior publication route.
If you receive a prior claiming objection, our patent objection reply service can prepare the amendment and the response.
Rule 30: amendment of the complete specification in case of anticipation
Sub-rule (1): hearing. If the applicant so requests at any time, or if the Controller is satisfied that the objection has not been removed within the two-month period in rule 29(2), a date for hearing the applicant shall be fixed forthwith, and the applicant shall be given at least ten days' notice of the date so fixed. The applicant shall, as soon as possible, tell the Controller whether he will attend.
Sub-rule (2): outcome. After hearing the applicant, or without a hearing if he has not attended or has notified that he does not wish to be heard, the Controller may specify or permit such amendment of the specification as will be to his satisfaction, and may direct that reference to such other specification, as he shall mention, shall be inserted in the applicant's specification, unless the amendment is made or agreed to within the period he fixes.
Notice that, unlike rule 28(2), rule 30(1) allows the request at any time and sets a floor of ten days for notice ("at least ten days' notice"), not a ceiling with a shorter alternative.
Rule 31: form of reference to another specification
When, under rule 30, the Controller directs that a reference to another specification be inserted in the applicant's complete specification, the reference shall be inserted after the claims in this form:
"Reference has been directed, in pursuance of section 18(2) of the Patents Act, 1970, to the specification filed in pursuance of application No......"
Rule 32: potential infringement
If, in consequence of an investigation under section 13, it appears to the Controller that the applicant's invention cannot be performed without substantial risk of infringement of a claim of another patent, the applicant shall be so informed and the procedure in rule 29 shall, so far as may be necessary, be applicable.
So the steps in rules 29 and 30 (information, opportunity to amend, possible postponement of grant for two months, hearing, direction for a reference) are borrowed for this case.
Rule 33: form of reference to another patent
Where the Controller directs that a reference to another patent be inserted in the applicant's complete specification under section 19(1), the reference shall be inserted after the claims in this form:
"Reference has been directed, in pursuance of section 19(1) of the Patents Act, 1970, to Patent No......"
| Rule | Situation | Key step | Period or form |
|---|---|---|---|
| 29(1) | Claim is claimed in another specification (section 13(1)(b)) | Applicant informed; chance to amend | No period stated |
| 29(2) | Specification otherwise in order | Controller may postpone grant | Two months to remove the objection |
| 30(1) | Applicant asks at any time, or objection not removed in two months | Hearing date fixed forthwith | At least ten days' notice |
| 30(2) | After hearing | Amendment specified or permitted; reference to other specification directed | Within period the Controller fixes |
| 31 | Reference to another specification | Inserted after the claims | Words quoted in the rule, citing section 18(2) |
| 32 | Risk of infringement of another patent's claim | Rule 29 procedure applies so far as necessary | As in rule 29 |
| 33 | Reference to another patent | Inserted after the claims | Words quoted in the rule, citing section 19(1) |
A worked example
Orchid Drives Pvt Ltd's complete specification claims a coupling mechanism. The Controller finds that another specification, earlier in the section 13(1)(b) sense, claims the same mechanism in one of its claims. Under rule 29(1) Orchid is informed and may amend. The rest of the specification is in order, so the Controller postpones the grant and gives two months to remove the objection (rule 29(2)).
The objection is not removed in two months. A hearing date is fixed forthwith, with at least ten days' notice (rule 30(1)). After the hearing, the Controller permits an amendment narrowing the claim and, unless the amendment is made within the fixed period, directs that a reference be inserted. The reference goes after the claims in the form in rule 31.
In a different case, the Controller finds that Orchid's other invention could not be performed without substantial risk of infringement of a claim of an existing patent. Rule 32 applies the rule 29 procedure, and if the Controller directs a reference to that patent, rule 33 gives the wording.
Points to watch
- Diarise the two months from the Controller's postponement under rule 29(2).
- Request a hearing early if you contest the objection: rule 30(1) allows the request at any time.
- Check the reference wording. If a reference is directed, the words in rule 31 or 33 are fixed, and the reference sits after the claims.
- Treat rule 32 as borrowing rule 29 "so far as may be necessary": the rule does not repeat the steps.
- Remember that rule 29A (grace period) is a different subject, covered in its own article, even though it follows rule 29 in numbering.
What the rules do not say
Rules 29 to 33 do not say how the applicant is to inform the Controller of agreement to an amendment, nor what Form accompanies a request for hearing; the Second Schedule list names no Form for it. The text also does not state what happens if the reference is directed but the applicant does not agree to it, other than that the Controller may direct it unless the amendment is made or agreed to within the period fixed.
Need help with a section 13 objection?
An objection of prior claiming or potential infringement can shape the claims you end up with. If you want your amendment, reply and hearing preparation handled together, you can talk to us about patent objection reply support.
Key takeaways
- Rule 29: the applicant is informed of a prior claiming objection and may amend; the Controller may postpone grant and allow two months.
- Rule 30: a hearing on request at any time, or if the objection is not removed in two months, on at least ten days' notice.
- The Controller may direct a reference to the other specification, inserted after the claims (rule 31).
- Potential infringement follows the rule 29 procedure (rule 32); the reference to another patent has its own form (rule 33).
- Check amendments after the Second Amendment Rules, 2024.
Read next
- Rule 28: anticipation by prior publication and hearing
- Rule 29A: grace period application in Form 31
- Common patent application rejections and how to overcome
- Sections 18-20 of the Patents Act, 1970
Disclaimer: Based on the Patents Rules, 2003 as consolidated up to 21 September 2021 and as amended by the Patents (Amendment) Rules, 2024 and the Patents (Second Amendment) Rules, 2024, as consulted on 2 October 2026. Later amendment rules, forms and fees should be checked in their current form. This article is general information, not legal advice; check the official text before acting.