can oppose the grant of a patent in an attempt to prevent (or revoke) the grant of a patent. In the European Patent Office, for example, any person may file opposition to the grant of a European patent within nine months from grant. In Israel, a third party may oppose an allowed application for three months after publication of the allowed application. Reissue, reexamination and interference In some jurisdictions, once a patent is issued, the patent holder may request a "reissue" of the patent to correct mistakes in the issued patent. Such "reissue applications" must typically be filed within a particular period of time following issuance of the original patent. In some jurisdictions, such as the United States, the patent holder may even seek to broaden the scope of the invention defined in the claims by filing a reissue application, although a broadening reissue in the USA must be filed within 2 years from grant. Also, in the United States, only the patent holder may file for reissue. The case of In Re Tanaka established the principle that a patentee can add narrow dependent claims to an issued patent through the reissue process, because a patent with narrower dependent claims is less subject to invalidation when litigated. More usually, however, the patentee must identify errors in the original claims, thereby surrendering some claim scope in return. In the United States, "reexamination" refers to the process of requesting that the patent office once again subject an issued patent to further examination, accompanied by patents or printed publications showing that there is a substantial new question of patentability ("SNQ"), and/or an explanation of the relevance of the prior art to the claimed invention. Unlike other invalidity considerations, only patents and printed publications will be considered in re-examination; see 37 CFR 1.552. Unlike reissue, reexamination may be requested not only by the patent holder or inventor, but by anyone, including anonymously, although whoever requests reexamination must also submit a fee, which is substantially higher than filing a new patent application. A benefit of reexamination is that issued patents may be either invalidated or once again deemed valid, without the considerable cost and lengthy time required for a full infringement lawsuit or declaratory judgment action. Also, in the United States, prior to the America Invents Act going into force in 2012, if two patent applications are filed which set forth claims directed to the