Nestle USA, Inc. v. Steuben Foods, Inc.

Aseptic packaging involves putting a sterile food product into a sterile package within a sterile environment. Steuben’s patent is generally directed to providing such a sterile environment in a sterilization tunnel. Sterile air, pressurized to a level above atmospheric pressure, flows out of the tunnel, ensuring that contaminants cannot flow into it. The aseptic sterilant may be hydrogen peroxide. Nestlé challenged claims of the patent in an inter partes review. The Patent Trial and Appeal Board instituted trial on claims directed to the sterilization tunnel and found that several of the challenged claims would have been obvious to a person of ordinary skill in the art in view of prior art references in the record. The Federal Circuit affirmed with respect to several claims, upholding the construction of “sterilant concentration levels.” With respect to Nestle’s appeal concerning a claim found to be not obvious, the court vacated the Board’s construction of the terms “aseptic” and “aseptically disinfecting.” Collateral estoppel attaches to that issue because Nestlé previously appealed the Board’s construction of “aseptic” in a separate inter partes review of another Steuben patent. In that case, the court relied on binding lexicography in the specification for “aseptic” to construe the term to mean the “FDA level of aseptic.” View "Nestle USA, Inc. v. Steuben Foods, Inc." on Justia Law