881 F.3d 894
Fed. Cir.2018Background
- Paice owns related patents ’634 and ’097 directed to a torque-based control algorithm for hybrid vehicles that switches between electric motor, internal combustion engine, or both based on road load (RL), a setpoint (SP), and maximum torque output (MTO). Some claims include electrical limits (e.g., battery DC voltage ≈ 500 V) and an "abnormal and transient conditions" limitation (e.g., operate below SP for drivability/safety).
- Ford filed multiple inter partes review (IPR) petitions challenging many claims as obvious over prior art, primarily Severinsky (U.S. Patent No. 5,343,970) and PCT publication WO 00/15455 (the ’455 PCT publication).
- The Patent Trial and Appeal Board (Board) held numerous claims unpatentable as obvious: some based on Severinsky (and other references) and a set of electrical claims based on the ’455 PCT publication in view of Severinsky.
- Paice appealed, arguing (1) Severinsky is speed-based not torque-based and does not meet the "abnormal and transient conditions" limitation; and (2) the ’455 PCT publication is not prior art to the electrical claims because those claims are entitled to an earlier priority date via the ’817 application which (Paice says) incorporates Severinsky.
- The Federal Circuit: affirmed the Board’s Severinsky-based obviousness findings for most challenged claims; affirmed the Board’s broad construction of "abnormal and transient conditions" to include starting/stopping the engine; but vacated and remanded the Board’s obviousness findings as to the ’634 patent electrical claims because the Board erred in ruling that the ’817 application did not incorporate Severinsky by reference and therefore failed to analyze whether the incorporated Severinsky provides the written description needed to secure the earlier priority date.
Issues
| Issue | Plaintiff's Argument (Paice) | Defendant's Argument (Ford) | Held |
|---|---|---|---|
| Whether Severinsky discloses a torque-based control algorithm (road load) | Severinsky is speed-based; any torque references are engine-output torque, not road load | Severinsky discloses using vehicle propulsion load/torque and a setpoint for engine operation; expert testimony supports this reading | Substantial evidence supports Board: Severinsky discloses torque-based selection (road load) and a setpoint; affirmed |
| Construction of "abnormal and transient conditions" | Term should be narrower and exclude starting/stopping in normal scenarios like city traffic/reverse | Term includes starting/stopping the engine; prosecution statements and related patents support including starts/stops | Broadest reasonable construction includes starting/stopping the engine (including in city traffic/reverse); affirmed |
| Whether the ’817 application incorporates Severinsky by reference (priority/written-description issue) | The ’817 application incorporates Severinsky (explicit language) so Severinsky can supply written description for later electrical claims | Board found incorporation limited/negated by a follow-on sentence and differences between disclosures | The court held the ’817 application does incorporate Severinsky in its entirety; Board erred in its contrary conclusion; vacated and remanded for further written-description analysis |
| Whether electrical claims are prior art–vulnerable given priority/written description | Electrical claims were added later; if ’817 + incorporated Severinsky provides written description, ’455 PCT is not prior art and claims may survive | Board found no written description in ’817 alone and treated ’455 PCT as prior art; thus found electrical claims obvious | Remand required: Board must determine whether ’817 with Severinsky incorporated provides adequate written description for the electrical limitations; prior holding on obviousness of those electrical claims vacated pending that factfinding |
Key Cases Cited
- KSR Int’l Co. v. Teleflex Inc., 550 U.S. 398 (Sup. Ct.) (framework for obviousness analysis)
- Cuozzo Speed Techs., LLC v. Lee, 136 S. Ct. 2131 (Sup. Ct.) (Board applies broadest reasonable construction in IPR)
- Teva Pharm. USA, Inc. v. Sandoz, Inc., 135 S. Ct. 831 (Sup. Ct.) (standard of review for factual findings underlying claim construction)
- Advanced Display Sys., Inc. v. Kent State Univ., 212 F.3d 1272 (Fed. Cir.) (incorporation-by-reference requires particularity)
- Harari v. Lee, 656 F.3d 1331 (Fed. Cir.) (broad incorporation language incorporates entire disclosure despite narrower language elsewhere)
- In re Gartside, 203 F.3d 1305 (Fed. Cir.) (substantial evidence standard)
- SEC v. Chenery Corp., 318 U.S. 80 (Sup. Ct.) (administrative agencies must provide reasoned explanations)