News & Analysis as of

Written Descriptions Prior Art Pharmaceutical Patents

Wilson Sonsini Goodrich & Rosati

Method of Treatment Claim’s Limiting Preamble Must Satisfy the Written Description Requirement

On March 13, 2025, the U.S. Court of Appeals for the Federal Circuit issued a decision in the case of In Re: Xencor, Inc. In this Appeal from the Appeals Review Panel of the Patent Trial and Appeal Board (ARP), with regard to...more

McDermott Will & Emery

Outlier? Split Federal Circuit Denies En Banc Review of Written Description Requirement

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit denied a patent owner’s request for en banc rehearing of a panel decision that invalidated a patent for lack of written description on the basis that a person of skill in the...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

Snell & Wilmer

Federal Circuit Upholds a Silent Written Description

Snell & Wilmer on

In a precedential opinion this week, the Federal Circuit affirmed a district court judgment in favor of Novartis Pharmaceuticals, in an appeal brought by HEC Pharm challenging the written description in Novartis’s 9,187,405...more

McDonnell Boehnen Hulbert & Berghoff LLP

Novartis Pharmaceuticals Corp. v. Accord Healthcare, Inc. (Fed. Cir. 2022)

When does the absence of evidence turn into evidence of absence, and when does such absence amount to an adequate written description of the absence of a step of a method claim?  This is a question that comes readily to mind...more

Haug Partners LLP

No Clear Error to Find Lack of Written Description for a Method of Treatment Patent Despite Separate Disclosures of the Drug,...

Haug Partners LLP on

Biogen International GMBH, Biogen MA, Inc., v. Mylan Pharmaceuticals Inc. marks the Federal Circuit’s most recent interpretation of the 35 U.S.C. § 112 written description requirement in the Hatch-Waxman context. No....more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - December 2021 #2

AstraZeneca AB v. Mylan Pharmaceuticals Inc., Appeal No. 2021-1729 (Fed. Cir. Dec. 8, 2021) - Our Case of the Week again focuses on numerical values in claims. Last week we addressed a case involving whether there was...more

McDonnell Boehnen Hulbert & Berghoff LLP

Supreme Court Denies Certiorari in Actavis Laboratories v. Nalproprion Pharmaceuticals

In the Supreme Court's recent clarifying campaign through the Federal Circuit's U.S. patent law jurisprudence, one section of the statute, 35 U.S.C. §112(a) has been noticeably left unscathed. Indeed, avoidance of this...more

McDermott Will & Emery

Equivalent Disclosure Used to Satisfy Written Description Requirement

McDermott Will & Emery on

Invoking a newly minted equivalent disclosure doctrine, a panel of the US Court of Appeals for the Federal Circuit found that the written description requirement of § 112 was satisfied in the interest of arriving at a...more

Bradley Arant Boult Cummings LLP

A Federal Circuit Prescription to Take Away the Pain for Generics - Intellectual Property News

The Federal Circuit recently reversed a lower court’s ruling of validity under the § 112 written description requirement effectively opening the door for a number of generic drug manufacturers to enter the market with a...more

Foley & Lardner LLP

Lumigan Patents Upheld by Unexpected Results

Foley & Lardner LLP on

In Allergan, Inc. v. Sandoz, Inc., the Federal Circuit affirmed the district court decision that upheld the validity of the Allergan patents relating to Lumigan® 0.01% glaucoma eye drops. This decision shows that it is still...more

Robins Kaplan LLP

GENERICally Speaking - Vol. 4, No. 1

Robins Kaplan LLP on

The Hatch-Waxman Litigation and Life Sciences practice groups at Robins, Kaplan, Miller & Ciresi L.L.P. are pleased to offer the latest edition of their quarterly publication regarding ANDA patent litigation issues and the...more

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