USPTO Central Reexamination Unit (CRU)

The USPTO Central Reexamination Unit (CRU) is not a federal district court and, therefore, does not handle patent litigation. Instead, the CRU is an administrative body within the United States Patent and Trademark Office (USPTO) responsible for conducting ex parte and inter partes reexaminations of issued patents. These reexaminations allow third parties or the patent owner to request a review of a patent's claims based on prior art, potentially leading to the confirmation, amendment, or cancellation of claims.

As an administrative unit, the CRU does not have a "patent docket" in the sense of a litigation court, nor does it conduct trials, issue claim construction orders, or rule on transfer motions. Its proceedings are administrative, focused on the patentability of claims in light of newly cited prior art, rather than disputes between parties over infringement or validity in a courtroom setting. Decisions made by the CRU can be appealed to the Patent Trial and Appeal Board (PTAB) and subsequently to the U.S. Court of Appeals for the Federal Circuit.

The CRU operates under the rules and procedures set forth by the USPTO for reexamination proceedings, primarily outlined in 37 C.F.R. Part 1, Subpart H. These rules govern the initiation, conduct, and conclusion of reexaminations, focusing on the examination of patent claims by patent examiners, not judicial officers. The process involves the submission of prior art and arguments, followed by office actions and responses, similar to original patent prosecution.

A tracked case, such as Stingray IP Solutions LLC v. Unified Patents — Rejections Maintained, Intent to Cancel Claims, exemplifies the CRU's role. This case illustrates an outcome where the CRU, through its reexamination process, determined that certain claims were unpatentable based on prior art, leading to their cancellation or rejections being maintained. This demonstrates the CRU's function in reassessing the validity of issued patents outside of the judicial system. The CRU does not have "judges" in the judicial sense, but rather relies on patent examiners to conduct the reexamination proceedings.