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  2. Reexamination - Wikipedia

    en.wikipedia.org/wiki/Reexamination

    A request for a reexamination can be filed by anyone at any time during the period of enforceability of a patent. To request a reexamination, one must submit a "request for reexamination" which includes (1) a statement pointing out each "substantial new question of patentability based on prior patents and printed publications; (2) an identification and explanation for every claim for which ...

  3. Patent opposition proceedings - Wikipedia

    en.wikipedia.org/wiki/Patent_opposition_proceedings

    Under United States patent law, an opposition proceeding is called a reexamination. Post-grant review provisions of the new patent law may affect a potential patent infringement defendant's strategies in filing a declaratory judgment action.

  4. Inter partes review - Wikipedia

    en.wikipedia.org/wiki/Inter_partes_review

    An inter partes review is used to challenge the patentability of one or more claims in a U.S. patent only on a ground that could be raised under 35 U.S.C. §§ 102 or 103 (non-obviousness), and only on the basis of prior art consisting of patents or printed publications. [3]

  5. Leahy–Smith America Invents Act - Wikipedia

    en.wikipedia.org/wiki/Leahy–Smith_America...

    Ironically, Congress intended that the reexamination process should have just the opposite effect: "Patent office reexamination will greatly reduce, if not end, the threat of legal costs being used to 'blackmail' such [patent-] holders into allowing patent infringements or being forced to license their patents for nominal fees."

  6. Patent prosecution - Wikipedia

    en.wikipedia.org/wiki/Patent_prosecution

    A re-examination is a proceeding conducted by the patent office after the grant of a patent in which the validity of a patent is re-examined at the request of the patentee or third party, [17] as provided by the applicable law. [27] In some countries, a re-examination system is provided as an alternative or complement to the opposition system ...

  7. United States patent law - Wikipedia

    en.wikipedia.org/wiki/United_States_patent_law

    Patent applications can be filed at the United States Patent and Trademark Office (USPTO). Prior to June 7, 1995, the duration of a US utility patent was 17 years from patent issuance. Since that date, the duration of the US utility patent is 20 years from the earliest effective filing date.