The American Invents Act replaces the traditional inter partes reexamination with Inter partes review. Specifically, the Act provides for a third party challenger to request inter review of an issued patent only on the grounds of anticipation and obviousness on the basis of patents and printed publications.

Wissen Research’s Inter Partes Review Searches identifies patent and non-patent literature documents that may be relevant to the patentability of one of more claims in the granted patent, offering the third party (petitioner) an opportunity to show that there is a reasonable likelihood that the petitioner would prevail with respect to at least one claim challenged.


A petition for inter partes review must be filed after the later of either (A) 9 months after the grant of the patent or issuance of a reissue patent; or if a post grant review is instituted, the termination of the post grant review.