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CPATA Patent Knowledge: Prosecution before the Canadian Intellectual Property Office

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Prosecution before the Canadian Intellectual Property Office

This domain tests the day-to-day mechanics of prosecuting a Canadian application before CIPO: the sequence of steps, the deadlines, the examiner's reports, amendments, and the routes to allowance or appeal. Expect questions on timing, the effect of amendments, and the options after a Final Action.

The prosecution sequence

  • Filing: application, petition, fee, abstract, claims, description, drawings (Rule 94).
  • Request for examination (Rule 133): within 4 years of the filing date; the application is deemed abandoned if not requested.
  • Examiner's report (Rule 86): the applicant has 4 months to respond (extendable under Rule 86(2) by 2 months on request with fee, and further under Rule 86(3)).
  • Final Action (Rule 86(7)): after two examiner's reports, the examiner may issue a Final Action; the applicant may respond within 4 months, and if the response does not overcome the objections, the application is refused.
  • Appeal to the Federal Court under s. 41 (as amended 2019) within 6 months of the refusal.
  • Allowance: notice of allowance, payment of the final fee within 4 months (Rule 113), and issuance.

Amendments

  • Rule 82: amendments to the description and claims may be made before the notice of allowance, but amendments that add matter not reasonably inferable from the specification as filed are prohibited (s. 38.2).
  • Rule 84: amendments after allowance require a request and fee.
  • Section 38.2: no amendment may add matter that was not disclosed or reasonably inferable.

Interviews and after-final practice

  • Examiner interviews are available and should be requested before filing a response to a Final Action.
  • Continued prosecution application (CPA) under Rule 116 allows a fresh application with the same disclosure to pursue different claims.

Worked example

An examiner issues a second examiner's report maintaining an obviousness objection. The applicant has 4 months to respond. If the response fails to overcome the objection, the examiner issues a Final Action; the applicant then has 4 months to respond, and if the Final Action is maintained, the application is refused. The applicant may appeal to the Federal Court within 6 months, or file a CPA to pursue narrower claims. The appeal route is not available until after the Final Action is maintained.

Traps

  • Treating the 4-month response period as non-extendable; Rule 86(2) permits a 2-month extension.
  • Confusing the Final Action with refusal; the Final Action is a step, not the end.
  • Missing the 6-month appeal deadline under s. 41.
  • Amending after allowance without the Rule 84 request and fee.