SEPTEMBER/OCTOBER 2014
I P L i t i g a t o r
5
Andrew P. Ritter is an associate at Sughrue Mion, PLLC in Washington, DC. His practice focuses on patent prosecution, inter partes matters, and opinion preparation on matters relating to infringement and validity in litigation. Mr. Ritter focuses on such areas as computer systems, medical systems, medical devices, electrical and optical connectors, and
- ther mechanical and electrical devices. The views
expressed herein are solely those of the author. In a recent inter partes review (IPR), the Patent and Trial Appeals Board (PTAB), in addressing two impor- tant concepts in construing and validating patent claims, found that only some of the grounds of patentability were sufficient to meet the “preponderance of the evi- dence standard” for determining claims unpatentable. Specifically, the PTAB held that claim terms in an IPR are construed in a broad but reasonable manner and that secondary considerations, without any nexus between the evidence of the secondary considerations and the claimed invention, are not enough to save claims from a prima facie case of obviousness.1 As the two-year anniversary of the implementation
- f the IPR approaches, a brief overview of the IPR is
provided, while presenting an analysis of the claim term construction and the application of secondary consider- ations in IPR proceedings.
Inter Partes Review Background
Inter partes review proceedings became available on September 16, 2012, replacing the preexisting inter partes reexamination procedure. Under the American Invents Act (AIA), the change from inter partes reexamination to IPR “convert[ed] inter partes reexamination from an examination to an adjudicative proceeding,” while also elevating the threshold for initiating IPRs, institut- ing estoppel provisions, and allowing the petitioner to challenge any and all patents, among other changes.2 The burden on the petitioner to prove invalidity in an IPR, however, remains unchanged from inter partes reexamination procedures, in which the petitioner must prove “that a patent is invalid by a preponderance of the evidence.”3 In addition, to determine the validity of a patent dur- ing an IPR, claim terms are construed using a “broadest reasonable construction” in view of the specification.4 Furthermore, factors relating to the validity of the claimed invention under 35 U.S.C. §§ 102 and 103 also must be investigated.
The “Broad But Reasonable” Claim Term
The enactment of the AIA by Congress gave petition- ers the ability to request that the PTAB cancel one or more claims of a patent, by determining that the claim
- r claims are unpatentable under 35 U.S.C. §§ 102 or
103, based on prior art consisting of patents and printed publications.5 Unlike litigation in district courts, where claims are presumed valid and claims are construed based on the narrower Phillips standard,6 the PTAB uses the broadest reasonable construction standard during IPRs of unexpired patents.7 Thus, the petitioner in an IPR has a greater opportunity to prove invalidity of one
- r more claims than an accused infringer in district court
litigation. While IPR proceedings are still in their infancy, the PTAB has made clear that the broadest reason- able interpretation standard will be applied in IPR
- proceedings. For example, the PTAB has applied the
broadest reasonable interpretation standard in each of its decisions. The PTAB’s decision in Nuvasive, Inc. v. Warsaw Orthopedic, Inc. provides several examples of the PTAB’s claim construction using the “broad but reasonable” standard.
Nuvasive, Inc. v. Warsaw Orthopedic, Inc.
During the Nuvasive IPR, six grounds of unpatentabil- ity were asserted against the patent at issue based on six asserted prior art. In its decision, the PTAB reproduced claim 9 as illustrative of the claimed subject matter of the patent.8 Claim 9 is directed to methods of performing surgery along a lateral aspect of the spine by sequentially