News & Analysis as of

Patent Prosecution History Prior Art

DLA Piper

What is a “Clear and Unmistakable” Prosecution History Disclaimer?

DLA Piper on

The Federal Circuit’s March 21, 2025 decision in Maquet Cardiovascular LLC v. Abiomed Inc. et al. (No. 2023-2045) and the recent Patent Trial and Appeal Board (PTAB) Delegated Rehearing Panel decision in SynAffix B.V. v....more

Morrison & Foerster LLP - Federal Circuitry

Last Week In The Federal Circuit (April 4 - 8): Claim Differentiation Carries The Day

Last week was argument week at the Federal Circuit, and we’ve already begun seeing decisions from the argued cases trickle in. Below we provide our usual weekly statistics and a detailed discussion of our case of the week—our...more

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

2021 PTAB Year in Review: Analysis & Trends: Discretionary Denial under § 325(d): Strategic Implications of the PTAB’s Advanced...

The USPTO Patent Trial and Appeal Board (PTAB) has increasingly used its discretionary denial authority in recent years. Although the PTAB’s discretion under 35 U.S.C. § 314(a) and Fintiv grabbed many headlines in 2021, 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

Knobbe Martens

Prosecution History Disclaimer and Estoppel Lead To Noninfringement

Knobbe Martens on

TRAXCELL TECHNOLOGIES, LLC V. NOKIA SOLUTIONS AND NETWORKS Before Prost, O’Malley, and Stoll. Appeal from the Eastern District of Texas. Summary: An applicant’s arguments distinguishing prior art during patent...more

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

PTAB Strategies and Insights - August 2021

The PTAB Strategies and Insights newsletter provides timely updates and insights into how best to handle proceedings at the USPTO. It is designed to increase return on investment for all stakeholders looking at the entire...more

Morrison & Foerster LLP - Federal Circuitry

Last Week in the Federal Circuit (August 16-20): Controlling for Authentication

It has been another steamy August week here in Washington and at the Federal Circuit, with eleven new opinions fresh off the press.  Below we provide our usual weekly statistics and our case of the week—our highly subjective...more

Morrison & Foerster LLP - Federal Circuitry

Last Week in the Federal Circuit (August 9-13): The Dangers of Relying Solely on Extrinsic Evidence for Claim Construction

Although things often slow down in Washington in the August heat and humidity, that wasn’t the case this past week for the Federal Circuit. All told, the Court issued 5 precedential opinions and ruled in 17 cases. Below we...more

Mintz - Intellectual Property Viewpoints

Expediting Patent Prosecution with the Newly Extended Collaborative Search Pilot Program

On February 4, 2021 the U.S. Patent and Trademark Office (USPTO) extended for two years the expansion of the Collaborative Search Pilot Program (CSP), which began in 2015 and is now scheduled to end October 31, 2022. The CSP...more

McDonnell Boehnen Hulbert & Berghoff LLP

Vectura Ltd. v. GlaxoSmithKline LLC (Fed. Cir. 2020)

Trial courts tend to get more than the benefit of the doubt when their decisions are viewed under the "abuse of discretion" standard, and juries similarly are affirmed unless there isn't substantial evidence supporting their...more

McDonnell Boehnen Hulbert & Berghoff LLP

Sherwin-Williams Co. v. PPG Industries, Inc. (W.D. Pa. 2020)

Earlier this month, in Sherwin-Williams Co. v. PPG Industries, Inc., Special Master Henry M. Sneath issued a Report and Recommendation in the U.S. District Court for the Western District of Pennsylvania that a motion by...more

Brownstein Hyatt Farber Schreck

Federal Circuit Infers Disavowal, Limiting Scope of Chamberlain Patent

The Federal Circuit has issued another opinion arising from the patent conflict between The Chamberlain Group and Techtronic Industries—and, once again, a patent owned by Chamberlain suffered a major blow. In Techtronic...more

Akin Gump Strauss Hauer & Feld LLP

PTAB Strikes from IPR Record References Introduced After Institution that Purportedly Showed State of the Art

The Patent Trial and Appeal Board has granted in part a Patent Owner’s motion to strike Petitioner’s Reply for improperly raising new arguments and citing new evidence. The Board, however, declined to throw out the entirety...more

McDermott Will & Emery

Sharp Turnaround on Applicability of § 112, ¶6 Analysis

McDermott Will & Emery on

Addressing the applicability of 35 USC § 112, ¶6 to the term “mechanical control assembly,” the US Court of Appeals for the Federal Circuit found that the Patent Trial and Appeal Board (PTAB) gave undue weight to the patent’s...more

Smart & Biggar

File wrapper estoppel in Canada

Smart & Biggar on

The Canadian Patent Act was amended last year to include a new provision which allows prosecution histories into evidence in patent proceedings to rebut representations made by the patentee regarding claims construction. ...more

Knobbe Martens

Federal Circuit Finds That a Variant Polypeptide Sequence Infringes Under the Doctrine of Equivalents

Knobbe Martens on

Ajinomoto Co., Inc. vs. CH Cheiljedang Corp. (2018-1590, 2018-1629) - In a pair of cross-appeals from the International Trade Commission, the Federal Circuit affirmed the Commission’s ruling that one of CJ CheilJedang...more

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