This page provides information about how to correspond with the Canadian Intellectual Property Office (CIPO) if you are filing a patent. It includes information about entering the national phase of Patent Cooperation Treaty (PCT) in Canada.
- Making submissions to the Patent Office
- Paying fees
- System and browser requirements
- Registering with Industry Canada
- Complete a general correspondence
- Instructions for paying to renew a patent agent
Making submissions to the Patent Office
You can electronically submit the following:
- fee payments
- patent applications
- requests for national entry of an international application
- other correspondence relating to applications and patents, with attached documents, if applicable, in accordance with the Patent Act and Patent Rules
Once you complete the general correspondence form (below), we will automatically create a letter for you addressed to the Commissioner of Patents.
If you wish to pay fees or correspond with our office in another way, please refer to our Contact us page for more information.
Documents such as assignments or the specification of the application must be provided in either TIFF or PDF format.
Biological sequence listings can be provided only in ASCII format. Biological sequence listings submitted under the Patent Rules in force prior to June 2, 2007, however, must also be provided in either TIFF or PDF format.
CIPO will send all further correspondence according to your preference (email or regular mail). Since email is currently not secure, when your correspondence relates to applications for patents that are not yet open to public inspection, you may wish to indicate that future correspondence be sent by regular mail. This provides better security of your information. Please advise us if you change your email address so that all future correspondence can reach the proper destination.
To become familiar with patent applications and how to prepare one, please read our tutorial on how to write a patent application. If you need technical assistance, please contact us or send a technical problem report form.
This page cannot be used to send correspondence related to international applications. Please see the Correspondence procedures Web page for more information.
For questions about payments, please see the page how to make a payment.
System and browser requirements
You should review our system and browser requirements to make sure you have the right software.
Registering with Industry Canada
Before you access any secure electronic services, you must first log on to the Industry Canada secure server. If you do not already have an Industry Canada account, you will need to create one.
Complete a general correspondence
2017-06-23 - Technical issues
We are currently experiencing issues with the latest update to the general correspondence application and working on resolving them.
Despite these issues, the general correspondence application is functional.
- For help with your username and password, contact the Industry Canada help desk.
- For questions related to patent applications, to get a user guide or for help related to patents’ electronic services, please contact the Client Service Centre.
- To report a technical problem, please complete the technical problem report form.
- Date modified: