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Pharmaceutical Patents Patent Litigation Patent Prosecution History

Venable LLP

PTAB Issues Final Written Decision Finding Seagen’s Adcetris® Patent Claims Unpatentable

Venable LLP on

On January 16, 2024, the PTAB issued a Final Written Decision in a post-grant review (“PGR”) of claims in U.S. Patent No. 10,808,039 (the “’039 patent”) owned by Seagen Inc. (“Seagen”). PGR2021-00030 was filed by Daiichi...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

2021 PTAB Year in Review: Analysis & Trends

[co-author: Jamie Dohopolski] Love it or hate it, ignore the USPTO Patent Trial and Appeal Board (PTAB) at your peril. The introduction of the PTAB as part of the America Invents Act over ten years ago has forever changed...more

Haug Partners LLP

AztraZeneca AB v. Mylan Pharms. Inc.: Claim Construction of a Percentage Term Guided by the Written Description and Prosecution...

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On December 8, 2021, the Federal Circuit in AztraZeneca AB v. Mylan Pharms. Inc. held that the claim construction of a percentage term should “‘most naturally align[] with the patent’s description of the invention,’ as...more

Smart & Biggar

Federal Court finds silodosin formulation patent valid but not infringed

Smart & Biggar on

On December 24, 2020, the Federal Court issued a decision in a patent infringement action pursuant to s. 6(1) of the Patented Medicines (Notice of Compliance) Regulations relating to silodosin (Allergan’s RAPAFLO): Allergan...more

Akin Gump Strauss Hauer & Feld LLP

District Court: Prosecution History Context Defeats Written Description Requirement

The District Court for the Northern District of West Virginia recently found method of treatment claims directed to treating a specific disease at a specific dose invalid for lack of written description based on the context...more

McDermott Will & Emery

When Is “Wherein” Clause Limiting? When It’s Material to Patentability

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit affirmed a district court’s finding, based largely on the prosecution history, that disputed “wherein” clauses were limiting and therefore the grant of a preliminary injunction...more

Knobbe Martens

The Doctrine of Equivalents May Apply Despite Restriction Requirements and Narrow Claiming

Knobbe Martens on

UCB, INC. v. WATSON LABORATORIES INC. Before Taranto, Schall, and Chen. Appeal from the United States District Court for the District of Delaware. Summary: Application of the doctrine of equivalents may not be barred...more

Smart & Biggar

Five important changes to the Canadian Patent Act now in effect

Smart & Biggar on

The Budget Implementation Act, 2018, No. 2, Statutes of Canada 2018, c.27, received Royal Assent on December 13, 2018. As discussed in our earlier article, this is wide-ranging legislation implementing various provisions of...more

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