Patent expiration and maintenance fee reminders

Upload your patent grant, IP assignment, or licensing agreement as a PDF or DOCX. We run an AI extraction on the document, find the patent term and expiration date, maintenance fee windows, annuity deadlines, and any licensing obligations tied to the patent, and suggest reminder dates for each. You can then start a free Contracko trial to track everything automatically, or note the dates yourself.

Yes, these are the deadlines that actually let patents lapse. US utility patent maintenance-fee windows open at 3.5, 7.5, and 11.5 years after grant, each with a six-month surcharge window after the standard window. Many jurisdictions charge annual annuities instead. The tool surfaces the schedule it finds in the document so you can set a reminder ahead of each window.

You'll see a list of suggested reminders pulled from your document, each anchored to the clause or schedule it came from. From there you can start a free Contracko trial to track them automatically with email alerts and owner assignments, or just note the dates yourself if that's all you need.

The free tool reads one document at a time. If you manage a portfolio, a Contracko trial lets you upload each patent and keep every maintenance fee window, expiration date, and license obligation in one tracked view, so a single missed fee never slips through.

Your document is transmitted over TLS encryption and processed by AI providers under terms that exclude training on your data. If you start a Contracko trial, the file moves into your private workspace and stays there.