USPTO Interference

Orrick IP lawyers are experienced at all phases of interference practice, including preliminary motions, pre-interference prosecution strategy, evidence preparation during the testimony phase, evidentiary motions, final briefing, and fact and expert witness preparation in the interference proceedings. Because interferences are highly specialized proceedings, combining substantive elements of patent prosecution and patent litigation, Orrick’s significant litigation experience combined with patent prosecution expertise brings all the necessary skills together to successfully represent clients at all stages of an interference.

  • Affymetrix, Inc. Orrick represented Affymetrix in the USPTO, where Orrick lawyers successfully withstood an interference action challenging the validity of two Affymetrix patents directed to Affymetrix' GeneChip® products. Orrick has also assisted Affymetrix defending the client’s GeneChip® product from patent infringement allegations of others and enforcing GeneChip® patents against infringers in court proceedings.
  • Dow AgroSciences, Inc. (formerly Mycogen Plant Science, Inc.) Orrick is currently representing client Dow AgroSciences in a district court appeal of an interference in Monsanto Corporation v. Mycogen Corporation pursuant to 35 U.S.C. §146, now pending before the U.S. District Court for the Southern District of California. This action concerns a contest for priority of invention to the Cry1F Bacillus Thuringiensis (Bt) gene sequence.
  • General Surgical Innovations, Inc. In Chin v. Kieturakis, Orrick obtained a favorable decision from the U.S. Patent Office Board of Appeals and Interferences on behalf of General Surgical Innovations over Guidant Corporation in a patent interference concerning patent claims for a surgical procedure. Orrick also obtained a favorable decision in a related arbitration of some of the interference issues. Ultimately, General Surgical Innovations, Inc. and its inventor were awarded priority of invention.
  • Vidamed Inc. Orrick has successfully represented Vidamed in a patent interference before the Board of Patent Appeals and Interferences at the United States Patent and Trademark Office.

Contacts for USPTO Interference


Brooks, James C.
PartnerLos Angeles (213) 612-2281
Geriak, James W.
PartnerOrange County (949) 852-7720
Howard, Elizabeth A.
PartnerSilicon Valley (650) 614-7316
Isackson, Robert M.
PartnerNew York (212) 506-5280
Simpson, Lisa T.
PartnerNew York (212) 506-3767
Smith, M. Brendan
AssociateNew York (212) 506-5298
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