Cheese Systems, Inc. v. Tetra Pak Cheese & Powder Systems, Inc.
725 F.3d 1341
Fed. Cir.2013Background
- The dispute concerns U.S. Patent No. 347 (the ’347 patent), which claims improvements to closed horizontal cheese-making vats by (1) contra-rotating agitator shafts and (2) orienting agitator panels so that during counter-rotation only cutting or only stirring faces pass through the overlapping (“common”) volume.
- CSI manufactured the High Solids Cheese Vat (HSCV), an enclosed, generally-horizontal, counter-rotating vat with curved paddles having sharpened (cutting) and blunt (stirring) faces; Tetra Laval owns the ’347 patent and Tetra Pak is its exclusive licensee.
- CSI filed a declaratory judgment action asserting noninfringement and invalidity; the district court granted summary judgment for Tetra Pak, finding literal infringement (and alternatively equivalents) and rejecting anticipation and obviousness defenses, and entered a permanent injunction.
- Key disputed claim constructions on appeal: (a) “generally common plane” for cutting/stirring edges; (b) meaning of “agitator panel”; and (c) the phrase “horizontally disposed axes.”
- CSI argued anticipation/obviousness based on several Jay patents and foreign prior art (AT ’523); the district court excluded portions of CSI’s late supplemental expert declaration and found the combination of prior art did not render the ’347 claims obvious or anticipated.
- The Federal Circuit affirmed: it adopted narrower readings of CSI’s arguments, concluded the accused device literally met the claims as construed, upheld the district court’s evidentiary rulings, and affirmed nonobviousness and non-anticipation determinations.
Issues
| Issue | Plaintiff's Argument (Tetra Pak) | Defendant's Argument (CSI) | Held |
|---|---|---|---|
| Construction of “generally common plane” (cutting/stirring edges) | Term requires only that a plurality of edges lie in a generally common plane; panels need not be entirely flat | CSI: requires panels to be “on the whole flat” (no curvature) | Court: Affirmed that only a plurality of edges must lie in a generally common plane; rejected flatness requirement; literal infringement supported |
| Meaning of “agitator panel” | Each separately mounted set of blades on a shaft qualifies as an agitator panel | CSI: term should mean the entire rotating structure on the shaft (so adjacent panels’ edges wouldn’t count separately) | Court: Adopted district court’s construction that individual blade structures rotably mounted on the axis are agitator panels; literal infringement established |
| “Horizontally disposed axes” claim term | Means generally oriented horizontally (permits slight incline) | CSI: axes must be exactly parallel to the ground | Court: Person of ordinary skill would read “horizontal” comparatively; slight incline permitted; HSCV meets element |
| Invalidity — Anticipation and Obviousness (prior Jay patents, AT ’523) | Prior Jay patents and AT ’523 render claims anticipated/obvious by revealing contra-rotation and blade arrangement | CSI: prior art taught counter-rotation and similar blades such that reversing panel orientation would be obvious; late expert supplementation supports combination | Held: Affirmed district court — Jay patents do not disclose reorienting panels so counter-rotation yields only cutting or only stirring; AT ’523 evidence ambiguous; excluded late expert material was within district court discretion; claims not anticipated or obvious |
Key Cases Cited
- Serdarevic v. Advanced Med. Optics, Inc., 532 F.3d 1352 (Fed. Cir.) (regional circuit summary judgment standards govern Federal Circuit review of summary judgment)
- Stoner v. Wisconsin Dept. of Agriculture, Trade & Consumer Prot., 50 F.3d 481 (7th Cir.) (district court must draw all reasonable inferences for nonmoving party on summary judgment)
- Cybor Corp. v. FAS Techs., Inc., 138 F.3d 1448 (Fed. Cir.) (claim construction is a legal question reviewed de novo)
- BMC Resources, Inc. v. Paymentech, L.P., 498 F.3d 1373 (Fed. Cir.) (direct infringement requires performance of each claim element literally or under equivalents)
- Net MoneyIn, Inc. v. Verisign, Inc., 545 F.3d 1359 (Fed. Cir.) (anticipation requires clear and convincing proof that a single prior art reference discloses all claim elements arranged as in the claim)
- KSR Int’l Co. v. Teleflex Inc., 550 U.S. 398 (Sup. Ct.) (framework for obviousness analysis and caution against hindsight)
- Power Integrations, Inc. v. Fairchild Semiconductor Int’l, Inc., 711 F.3d 1348 (Fed. Cir.) (role of objective indicia of nonobviousness as a check against hindsight)
- Musser v. Gentiva Health Servs., 356 F.3d 751 (7th Cir.) (district court’s discovery sanctions reviewed for abuse of discretion)
- Gen. Elec. Co. v. Joiner, 522 U.S. 136 (Sup. Ct.) (abuse-of-discretion standard for exclusion of expert testimony)