The United States Patent and Trademark Office (USPTO) has a specific prioritization system for different types of patent cases. According to MPEP 2261, the priority order is as follows: Reexamination proceedings and reissue applications involved in litigation Reexamination proceedings not involved in litigation All other cases The MPEP specifically states: "Any cases involved in litigation, whether they are reexamination proceedings or reissue applications, will have priority over all other cases. Reexamination proceedings not involved in litigation will have priority over all other cases except reexaminations or reissues involved in litigation." This prioritization ensures that cases with time-sensitive legal implications are handled first, followed by other reexamination proceedings, and then standard patent applications and other matters. To learn more: USPTO prioritization patent cases reexamination priority litigation priority