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 Innovation, Science and Economic Development Canada
- Complete a general correspondence
- Instructions for paying to renew a patent agent
- Reinstatement of an application and putting a patent back into good standing
Making submissions to the Patent Office
You can electronically submit the following:
- fee payments
- 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.
You can pay using a credit card or by deposit account.Footnote1.
System and browser requirements
You should review our system and browser requirements to make sure you have the right software.
Registering with Innovation, Science and Economic Development Canada
Before you access any secure electronic services, you must first log on to the Innovation, Science and Economic Development Canada secure server. If you do not already have an Innovation, Science and Economic Development Canada account, you will need to create one.
Complete a general correspondence
Create a new or load a saved general correspondence
Reinstatement of an application and putting a patent back into good standing
To reinstate your Application you must pay the following fees:
- Reinstatement Fee
- Late Fee, if applicable
- The Fee you are trying to reinstate, if applicable
For example if you are trying to reinstate an application that has gone abandoned due to a missed Maintenance Fee then you will need to do the following in the General Correspondence form:
- Attach a document explaining why you were not able to pay the maintenance fee on time. You may complete this on the Attachment step of the General Correspondence form.
- Select Reinstatement of abandoned application from fee section Part I - Applications
- Select Late payment fee from fee section Part IV - General
- Select the appropriate maintenance fee from Part VI - Maintenance Fee
- 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.
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