Dome Patent L.P. v. Lee
799 F.3d 1372
Fed. Cir.2015Background
- Dome owns U.S. Patent No. 4,306,042 claiming a method to make oxygen‑permeable, rigid, hydrophilic contact‑lens materials using Tris (a siloxanyl alkyl ester), MMA, a wetting agent, and a siloxane‑based cross‑linker.
- A third‑party ex parte reexamination resulted in the PTO finding claim 1 obvious; Dome sued under 35 U.S.C. § 145 seeking to overturn the PTO’s rejection.
- The district court reviewed the reexamination de novo on the record, applied the preponderance standard, and held claim 1 obvious in light of prior art (Gaylord, Ellis, Tanaka) and record evidence.
- Key technical dispute: whether a person of ordinary skill would have been motivated to combine Gaylord’s Tris/MMA teachings with Tanaka’s siloxane cross‑linkers despite Tanaka’s warnings about Tris‑type monomers causing opacity.
- The district court found motivation to combine, no effective teaching away, and that Dome’s objective indicia (e.g., commercial success) did not overcome the obviousness determination.
- The Federal Circuit affirmed, holding the district court used the correct legal standard and its factual findings were not clearly erroneous.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Standard of proof in §145 review | Dome: the PTO must prove invalidity by clear and convincing evidence because §282 presumption of validity applies | PTO: §145 review of a reexamination is not an infringement defense; reexamination uses preponderance and no presumption applies | Preponderance applies in §145 reexamination review; court affirmed preponderance standard |
| Obviousness — motivation to combine references | Dome: Tanaka teaches away from combining Tris with hydrophobic siloxane cross‑linkers, suggesting alternative amphiphilic monomers; thus no motivation | PTO: Gaylord, Ellis, Tanaka together teach the problem (need oxygen permeability) and solutions; a POSA would be motivated to combine to improve oxygen permeability | Court: A POSA would have been motivated to combine references; district court’s finding was not clearly erroneous |
| Teaching away / weight of Tanaka | Dome: Tanaka’s warnings about opacity would discourage using Tris with siloxane cross‑linkers | PTO: Other references (Gaylord, Ellis) provide workable roadmaps to maintain clarity while using Tris; Tanaka’s warning is not a strong teaching away | Court: Tanaka did not teach away sufficiently to preclude obviousness; other prior art mitigated Tanaka’s warning |
| Objective indicia (commercial success, etc.) | Dome: Boston IV lens embodies claim 1 and shows commercial success tied to the invention | PTO: Commercial success evidence is weak and attributable partly to other factors; objective indicia do not overcome obviousness | Court: District court considered objective indicia but gave them little weight; objective indicia do not overcome obviousness |
Key Cases Cited
- KSR Int’l Co. v. Teleflex Inc., 550 U.S. 398 (2007) (obviousness requires flexible, common‑sense analysis rather than rigid rules)
- Microsoft Corp. v. i4i Ltd. Partnership, 564 U.S. 91 (2011) (clear and convincing standard for invalidity defenses in infringement suits)
- Rambus Inc. v. Rea, 731 F.3d 1248 (Fed. Cir.) (preponderance standard in reexamination proceedings)
- In re Swanson, 540 F.3d 1368 (Fed. Cir.) (no presumption of validity in reexamination; preponderance standard)
- Graham v. John Deere Co., 383 U.S. 1 (1966) (Graham factors govern obviousness inquiry)
- Par Pharm., Inc. v. TWI Pharm., Inc., 773 F.3d 1186 (Fed. Cir.) (obviousness standard and review allocation of facts and law)