Utility Patent Cases
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Utility Patent

Federal Circuit
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Rexnord Corp. v. Laitram Corp. — Specifications Describe Preferred Embodiments and Cannot Limit Claims to Those Embodiments Absent Clear Disclaimer

The Federal Circuit reversed a summary judgment of non-infringement in a modular conveyor belt patent case, holding that the district court improperly limited the claim term ‘portion’ to a narrow construction requiring physical separation, when the plain meaning of ‘portion’

Federal Circuit
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Bio-Technology General Corp. v. Genentech, Inc. — Patent on Recombinant Human Growth Hormone Is Enabled Even Though Process Produces Predominantly Met-hGH Rather Than Mature hGH

The Federal Circuit reversed a judgment of invalidity for lack of enablement, holding that a patent on a recombinant method for producing human growth hormone (hGH) was adequately enabled even though the process predominantly produced met-hGH (containing an extra methionine residue) rather than matu

Federal Circuit
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Toro Co. v. White Consolidated Industries — Separating a Unitary Claim Structure into Two Pieces May Infringe Under Doctrine of Equivalents

The Federal Circuit vacated summary judgment and remanded for trial, holding that splitting a claimed unitary structure into two separate components may constitute infringement under the doctrine of equivalents even when the literal claim requirement for a single integrated piece is not met.

Federal Circuit
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Exxon Research & Engineering Co. v. United States — Close Questions of Claim Construction Do Not Automatically Render Claims Indefinite

The Federal Circuit reversed a summary judgment of invalidity for indefiniteness, reaffirming that claims are sufficiently definite under § 112 if a person skilled in the art would understand the bounds of the claim when read in light of the specification — close questions of claim construction do n

Federal Circuit
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Gart v. Logitech, Inc. — Preferred Embodiment’s Specific Structure Cannot Limit Broader Claim Language; Patent Notice Letters Must Identify Specific Products

The Federal Circuit vacated summary judgment of non-infringement, holding that the district court improperly imported a structural limitation (a “ledge”) from the patent drawings into a broader claim term (“angular medial surface”), and clarified when a patentee’s pre-s

Federal Circuit
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Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co. — En Banc Federal Circuit Creates Complete Bar to Doctrine of Equivalents After Claim Amendment

The Federal Circuit sitting en banc adopted a sweeping complete-bar rule: any narrowing amendment made during prosecution to comply with the Patent Act creates an absolute estoppel that bars all claims of equivalence for the amended element — a rule later rejected by the Supreme Court in 2002.

Federal Circuit
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Watts v. XL Systems — Claim Limitation Lacking the Word “Means” Carries Presumption Against Means-Plus-Function Treatment

The Federal Circuit held that a claim limitation that does not use the word “means” carries a strong presumption against means-plus-function treatment under § 112(6), and that even when that presumption is overcome, the limitation must still be construed in light of the specification to

Federal Circuit
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Ajinomoto Co. v. Archer-Daniels-Midland Co. — Importing Bacteria Made by Patented Process Infringes Under § 271(g) Even When Manufacture Occurred Abroad Under a Foreign License

The Federal Circuit affirmed infringement of a process patent covering genetically engineered bacteria for producing the amino acid threonine, holding that importing bacteria manufactured abroad using the patented method constitutes infringement under 35 U.S.C. § 271(g) even when the manufacturing w

Federal Circuit
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Schering Corp. v. Amgen Inc. — Consensus Interferon Does Not Infringe Recombinant DNA Patents on Natural Interferon Subtypes

The Federal Circuit affirmed non-infringement, holding that Amgen’s synthetic consensus interferon-alpha (INFERGEN) did not infringe Schering’s recombinant DNA patents because it duplicated no natural interferon subtype and therefore did not use the patented recombinant DNA methods to pr

Federal Circuit
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Bayer AG v. Elan Pharmaceutical Research Corp. — Repeated Prosecution Statements Touting Superiority of Claimed Range Create Clear and Unmistakable Surrender of Broader Scope

The Federal Circuit affirmed summary judgment of non-infringement in an ANDA patent case, holding that Bayer’s repeated prosecution statements characterizing its claimed nifedipine crystal surface area range as ‘special’ and producing ‘superior’ performance created a cl

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