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  2. Patent opposition proceedings - Wikipedia

    en.wikipedia.org/wiki/Patent_opposition_proceedings

    Timeframes for filing opposition: The period during which an opposition can be filed may commence immediately after the publication of the patent application, after a positive examination result, or following the grant of the patent. The duration of this period varies, typically ranging from two to six months for pre-grant oppositions and six ...

  3. Opposition proceeding - Wikipedia

    en.wikipedia.org/wiki/Opposition_proceeding

    An opposition proceeding is an administrative process available under the patent and trademark law of many jurisdictions which allows third parties to formally challenge the validity of a pending patent application ("pre-grant opposition"), of a granted patent ("post-grant opposition"), or of a trademark.

  4. Patent prosecution - Wikipedia

    en.wikipedia.org/wiki/Patent_prosecution

    Post-grant opposition serves as an efficient and cost-effective alternative to litigation for disputing a patent's validity. It helps maintain the integrity of the patent system by ensuring that only patents meeting all legal standards remain in force, thereby balancing the rights of patent holders with the interests of the public and competitors.

  5. Opposition procedure before the European Patent Office

    en.wikipedia.org/wiki/Opposition_procedure...

    The opposition procedure before the European Patent Office (EPO) is a post-grant, contentious, [1] inter partes, administrative [2] procedure intended to allow any European patent to be centrally opposed.

  6. Limitation and revocation procedures before the European ...

    en.wikipedia.org/wiki/Limitation_and_revocation...

    The EPC of 1973 made no provision for a limitation procedure, [6] and a fortiori no provision for centrally limiting a European patent before the EPO after the nine-month period for filing an opposition (nine months as from the date of grant of the European patent). The travaux préparatoires laid out the rationale for a limitation procedure:

  7. Leahy–Smith America Invents Act - Wikipedia

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

    Named for its lead sponsors, Sen. Patrick Leahy (D–VT) and Rep. Lamar Smith (R–TX), [2] the Act switches the U.S. patent system from a "first to invent" to a "first inventor to file" system, eliminates interference proceedings, and develops post-grant opposition. Its central provisions went into effect on September 16, 2012 and on March 16 ...

  8. Return Mail Inc. v. United States Postal Service - Wikipedia

    en.wikipedia.org/wiki/Return_Mail_Inc._v._United...

    The Leahy-Smith America Invents Act was passed in 2011 to refine the patent system. Among its major changes include the introduction of a post-grant opposition system, allowing a "person who is not the owner of a patent" to issue a challenge to one or more claims of a patent that has been granted.

  9. United States patent law - Wikipedia

    en.wikipedia.org/wiki/United_States_patent_law

    Under United States law, a patent is a right granted to the inventor of a (1) process, machine, article of manufacture, or composition of matter, (2) that is new, useful, and non-obvious. A patent is the right to exclude others, for a limited time (usually, 20 years) from profiting from a patented technology without the consent of the patent ...