Calculate Deadlines U.S. Intellectual Property Deadlines Utility Patent Design Patent Trademark Copyright The Inevitable Disclaimer:  Please do not rely solely on this calculator.  Although we make efforts to ensure the reliability of the program, continuous changes in the law, special weekend and holiday deadline rules and other factors may affect the overall accuracy of the results.  If you find any discrepancy in the results displayed from what is statutorily provided, please contact us.