US National Stage

tools and resources for Global inventors, whether from the US, Canada,
Europe, the Middle East, Australia, Polynesia, Asia, or the Americas

US Utility Patent Maintenance Fee Calculator

This is a free service provided by Da Vinci Partners (Swiss-based U.S. Patent Law Firm) to assist patent attorneys, businesses and inventors determine the expiration date and maintenance fee dates for US utility patents.

Application Filing Date dd mm yyyy
Issue Date dd mm yyyy

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