How to maintain your patent application and patent protection.
Services and information
Pay maintenance fees
Learn how and when to pay patent application and patent maintenance fees.
Reinstate an abandoned patent application
How to reinstate an abandoned patent application.
Reverse the deemed expiry of a patent
How to reverse the deemed expiry of a patent.
Correct applications and patents
Have your patent reissued or add a disclaimer to correct a patent application or patent you own.
Re-examination
Ask to have the claims of a patent re-examined if new information is brought forward.
Due care determinations
View list of determinations related to due care made by the Commissioner of Patents.