INTERFERENCE AND DERIVATION

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Interference proceedings are used by patent applicants to challenge qualified patent or application claims based on prior invention, derivation, and possibly other patentability grounds. Derivation proceedings are used by patent applicants to challenge qualified patent or application claims based on derivation by the opponent.

POST-GRANT REVIEW

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Post-grant review (PGR) proceedings are used by third parties to challenge qualified patent claims based on patents, printed publications, and a variety of other patentability grounds. The third party requestor participates throughout the proceeding and any related appeals.

INTER PARTES REVIEW

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Inter partes review (IPR) proceedings are used by third parties to challenge patent claims based on patents and printed publications. The third party requestor participates throughout the proceeding and any related appeals.

Ex parte reexamination

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Ex parte reexamination proceedings are used by patentees and third parties to challenge patent claims based on patents and printed publications.  Once initiated, third party requestors are not permitted to participate in the proceeding or any related appeals.

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