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Patents general correspondence form

From: Canadian Intellectual Property Office

This page explains how to correspond with or send documents to the Canadian Intellectual Property Office (CIPO) if you are filing a patent application or communicating with us about a patent.

For applications and patents related to section 20 of the Patent Act (items of national security), follow the necessary steps to correspond with CIPO.

If you are already familiar with this process:

Log in to patents general correspondence

On this page

What you can submit using the general correspondence form

You can electronically submit the following:

There are specific requirements in the Patent Rules regarding who can communicate with the Patent Office with respect to patent applications and patents for certain actions. See chapter 5 of the Manual of Patent Office Practice for additional information on representation.

Patent agents: How to change your name, postal address or email address

Communications should be addressed to the Maintenance Fee section of the Patent Office.

Patent agents must inform the Patent Office if they change their name, postal address or email address.

When a patent agent changes their name or address or moves from one firm to another:

  • We will apply a change of name or address to all patent matters where the agent is appointed as a patent agent or associate patent agent, unless the communication provided to the Office contains instructions to the contrary.

When a new firm employing patent agents is created, or when an existing firm changes its name:

  • A representative of the firm should immediately submit a written communication to the Office. This will allow us to effectively process any appointment of agents at this firm (as patent agent or associate patent agent).
  • Include the name and address of the firm
  • Include a list of patent agents who are employed by the firm
  • We will update the individual records of the patent agents working at the new or newly named firm.
  • We will update the addresses of each of the listed agents to reflect that of the new or newly named firm, unless the communication provided to the Office contains instructions to the contrary.

Please note that the above notice does not address the related topic of successions under section 32 of the Patent Rules. For information regarding successions, see chapter 5.06 of the Manual of Patent Office Practice.

Document format

Documents must be provided in either TIFF or PDF, with the exception of nucleotide and amino acid sequence listings.

  • Nucleotide and amino acid sequence listings submitted for applications with a filing date on or after must be in WIPO ST.26 XML format.
  • Nucleotide and amino acid sequence listings submitted for applications with a filing date before but on or after should be submitted in WIPO ST.25 format as text files.
  • Nucleotide and amino acid sequence listings submitted under the Patent Rules in force prior to , where one of the above sequence listing formats is submitted, must also be provided in either TIFF or PDF.

Submit general correspondence

Review our system and browser requirements to make sure you have the right software.

To access the general correspondence form, you need a My Canada Business Account (formerly known as My ISED Account).

Don't have an account? Visit the login page and follow the steps to create an account.

Log in to general correspondence

Problems?

After you submit

Once you complete the general correspondence form, we will automatically create a letter for you addressed to the Commissioner of Patents.

CIPO will send all further national correspondence according to your preference (email or regular mail). When your correspondence relates to applications for patents that are not yet open to public inspection, you may wish to request that future correspondence be sent by regular mail.

Please advise us if you change your email address so that all future correspondence can reach the proper destination.

Contact CIPO

PCT outgoing correspondence will continue to be sent by mail.

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