News & Analysis as of

Extrinsic Evidence Claim Construction

Locke Lord LLP

How Much Claim Construction ‎Significance? – Extrinsic Evidence and Significant Figures

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In almost every claim construction, the courts make their claim construction ruling largely based on the intrinsic evidence – the claims, specification and prosecution history. However, the Federal Circuit (CAFC) bucked this...more

Axinn, Veltrop & Harkrider LLP

Failing the Litmus Test? Weighing the Extrinsic Evidence in Construing "a pH of 13 or higher"

The Federal Circuit's claim construction gospel set forth in Phillips has been entrenched in the minds of patent litigators for nearly 20 years.1 The intrinsic evidence - the claims, specification, and prosecution history -...more

McDermott Will & Emery

Context Is Key in Claim Construction

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The US Court of Appeals for the Federal Circuit reiterated that intrinsic evidence trumps extrinsic evidence in determining the meaning of claim terms. Sequoia Technology, LLC v. Dell, Inc. et al., Case Nos. 21-2263; -2264;...more

Morrison & Foerster LLP - Federal Circuitry

Last Week In The Federal Circuit (January 17 – January 20): “Larger Than” Or “Large Enough”?

If you think claim construction is more fun than watching paint peel, then you’re probably a patent lawyer. And what’s more fun than claim construction? Claim construction with an indefiniteness challenge, as happened in this...more

McDermott Will & Emery

Dictionaries Don’t Know Best: The Intrinsic Record Prevails (Again)

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit addressed the tension between the intrinsic and extrinsic record in claim construction, holding that the intrinsic record should be relied on first. The Court therefore reversed...more

McDermott Will & Emery

Bad Connection: Claim Construction Argument without Explanation Given No Weight

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board (Board) obviousness decision after finding that the patent owner failed to explain how its cited extrinsic evidence supported its proposed...more

McDermott Will & Emery

Terms of Degree Not Always Indefinite

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The US Court of Appeals for the Federal Circuit overturned a district court determination that the claim terms “resilient” and “pliable” were indefinite. The Federal Circuit found that the claims, while broad, were...more

McDermott Will & Emery

Game Reset: Extrinsic Evidence Can’t Limit Claim Scope Beyond Scope Based on Unambiguous Intrinsic Evidence

The US Court of Appeals for the Federal Circuit reversed a district court’s grant of summary judgment of noninfringement after concluding that the district court erred by relying on expert testimony to construe a claim term...more

Snell & Wilmer

Federal Circuit Rejects “Unanswered Questions” Indefiniteness Standard

Snell & Wilmer on

Last week, a split Federal Circuit panel reversed a decision invalidating certain computer-aided-design patent claims because the district court used an incorrect indefiniteness standard....more

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

PTAB Strategies and Insights - August 2021: Federal Circuit Remands for Board's Improper Use of Extrinsic Evidence During Claim...

In Seabed Geosolutions (US) Inc. v. Magseis FF LLC, the Federal Circuit vacated and remanded an inter partes review decision for the Patent Owner. The Court held that the Patent Trial and Review Board failed to perform the...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 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

Knobbe Martens

Clear Intrinsic Evidence Forecloses Extrinsic Evidence of Special Meaning

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SEABED GEOSOLUTIONS (US) INC. v. MAGSEIS FF LLC. Before Moore, Linn, and Chen.  Appeal from the Patent Trial and Appeal Board. Where a claim term’s meaning is clear from the intrinsic evidence, no extrinsic evidence...more

McDermott Will & Emery

Stick to the Fax: Conflicting Statements Made During Prosecution Lead to Indefiniteness

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In deciding whether use of the term “passive link” to define a connection between a computer terminal and a fax machine rendered a patent claim indefinite, the US Court of Appeals for the Federal Circuit affirmed the district...more

Morrison & Foerster LLP - Federal Circuitry

Last Week in the Federal Circuit (December 14-18): And/or confusion

Last week, we got what may be the last big batch of Federal Circuit opinions of 2020.  (In 2019, only six more opinions issued between this time and the end of the year.)  Although most of last week’s decisions were issued...more

McDonnell Boehnen Hulbert & Berghoff LLP

IBSA Institut Biochimique, S.A. v. Teva Pharmaceuticals USA, Inc. (Fed. Cir. 2020)

The Federal Circuit has spent the past few years applying the Supreme Court's most recent precedent, Nautilus, Inc. v. Biosig Instruments, Inc., on the indefiniteness standards in the patent statute.  35 U.S.C. § 112(b).  The...more

Knobbe Martens

The Definition of “Half-Liquid” Is Only Half Baked

Knobbe Martens on

IBSA INSTITUT BIOCHIMIQUE, S.A. V. TEVA PHARMACEUTICALS USA, INC. Before Prost, Reyna, and Hughes. Appeal from the District Court of Delaware - Summary: A term may be indefinite when the proposed construction is not...more

Knobbe Martens

Federal Circuit Review - September 2019

Knobbe Martens on

State Sovereignty Principles Do Not Allow a State to Bring a Patent Infringement Suit in an Improper Venue - In Board of Regents v. Boston Scientific Corp., Appeal No. 2018-1700, the Federal Circuit ruled that the patent...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

McDermott Will & Emery

Extrinsic Evidence Not Required to Overcome Means-Plus-Function Interpretation

McDermott Will & Emery on

Addressing construction of claims including means-plus-function claim elements, the US Court of Appeals for the Federal Circuit overturned an International Trade Commission (ITC) plain and ordinary meaning construction in...more

Knobbe Martens

Federal Circuit Review - May 2018

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Priority Claims Cannot Be Incorporated by Reference - In Vanda Pharmaceuticals Inc. v. West-Ward Pharmaceuticals International Limited, Appeal Nos. 2016-2707 and 2016-2708, the Federal Circuit held that when a patent for a...more

McDermott Will & Emery

Extrinsic Evidence Can Be Used to Support Inherent Anticipation

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial and Appeal Board (PTAB) finding that the challenged claims were anticipated and obvious. Monsanto Tech. LLC v. E.I. DuPont de Nemours & Co., Case No....more

Jones Day

IPR Proceedings: Extrinsic or Intrinsic Evidence for Claim Construction?

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In district courts’ claim construction analyses, intrinsic evidence is of paramount importance. Although extrinsic evidence “may be useful to the court,” it is considered “less significant” than the claim language,...more

Proskauer - New England IP Blog

Court Bounces Untimely Extrinsic Evidence in Claim Construction Phase

In order to carry out the “just, speedy, and inexpensive determination” of the cases before them, courts rely on scheduling orders to ensure that cases move forward in a timely and efficient manner. In patent cases, where...more

McDonnell Boehnen Hulbert & Berghoff LLP

News from Abroad: Canada's Federal Court Questions No File Wrapper Estoppel on Claim Construction

The Supreme Court of Canada in Free World Trust v Électro Santé Inc, 2000 SCC 66 rejected the use of extrinsic documents such as file wrappers (patent prosecution histories) for claim construction, on the basis that allowing...more

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