A recent ruling by the U.S. District Court for the Western District of Oklahoma underscores the high stakes involved in patent prosecution, even down to the minutest details. In the case of SIPCO LLC v. Jasco Products Company LLC, the court dismissed SIPCO’s patent infringement claims due to a minor typo made by the U.S. Patent and Trademark Office (USPTO) during the prosecution phase. This case highlights the critical importance of ensuring accuracy in terminal disclaimer applications, particularly the patent number.