News & Analysis as of

Collateral Estoppel

Akin Gump Strauss Hauer & Feld LLP

District Court Bifurcates Trial to Decide PGR Estoppel Issues Prior to Jury Trial

The District Court for the Northern District of California recently granted a defendant’s motion to bifurcate, ordering that issues related to PGR estoppel should be decided in a bench trial, while the remaining issues in the...more

McDermott Will & Schulte

Failure to reassess subject matter eligibility after similar claims invalidated justifies attorneys’ fees

McDermott Will & Schulte on

Following a dismissal on the pleadings, the US District Court for the Southern District of New York granted the defendant’s motion for attorneys’ fees under 35 U.S.C. § 285 after concluding that the asserted patent was...more

Patterson Belknap Webb & Tyler LLP

No Two Ways About Fees: Judge Oetken Grants Attorneys’ Fees Under Patent Act But Not Section 1927

In a recent patent infringement case, Judge J. Paul Oetken (S.D.N.Y.) awarded attorneys’ fees under the Patent Act because the case was “exceptional,” but denied fees under 28 U.S.C. § 1927 and the court’s inherent authority...more

Patton Sullivan Brodehl LLP

Alter Ego Liability — Judgment Denying Alter Ego Liability Isn’t Necessarily “Collateral Estoppel”

The “alter ego” doctrine has been a frequent topic of posts on the Money and Dirt and LLC Jungle blogs... Normally, a court will treat a business entity and its liabilities as separate and distinct from its owners. The...more

Proskauer - The Patent Playbook

Federal Circuit Clarifies Limits of Issue Preclusion Between IPRs and District Courts

The Federal Circuit’s recent decision last week in Inland Diamond Prods. Co. v. Cherry Optical Inc., offers an important reminder for patent litigators: a PTAB’s factual finding in an inter partes review (IPR) does not...more

Marshall Dennehey

Delaware Supreme Court Upholds Dismissal of Legal Malpractice Claims Based on Collateral Estoppel

Marshall Dennehey on

Hernandez v. Baird Mandalas Brockstedt & Federico, LLC, 2025 WL 1304194 (Del. May 6, 2025) - The Delaware Supreme Court affirmed the Superior Court’s dismissal of the plaintiffs’ legal malpractice claims under the collateral...more

McDermott Will & Schulte

Collateral estoppel remains inapplicable to unchallenged IPR claims

Returning to its decision in Kroy IP, the US Court of Appeals for the Federal Circuit denied a petition for panel rehearing and rehearing en banc, leaving undisturbed its prior opinion that collateral estoppel does not apply...more

A&O Shearman

Federal Circuit Issues Key Ruling On Collateral Estoppel And Patent Invalidity

A&O Shearman on

The Federal Circuit recently issued a decision in the ongoing dispute in Kroy IP Holdings, LLC v. Groupon, Inc., addressing the collateral estoppel effect of Patent Trial and Appeal Board (PTAB) decisions on subsequent...more

Patterson Belknap Webb & Tyler LLP

If at First You Don’t Succeed, Do Not Try Again: Judge Oetken Invokes Collateral Estoppel to Dismiss Plaintiff’s Infringement...

On July 9, 2025, Judge J. Paul Oetken (S.D.N.Y) found that collateral estoppel barred plaintiff Linfo IP, LLC from relitigating the validity of its asserted patent and dismissed Linfo’s infringement claims against Aero...more

Marshall Dennehey

The Nature of Attorney Disciplinary Proceedings

Marshall Dennehey on

Key Points: The Pennsylvania Supreme Court has clarified that the standard of proof required for a finding of attorney misconduct is “clear and convincing evidence.” Attorney disciplinary matters “are in the nature of...more

Carlton Fields

Florida Appeals Court Decisions Week of May 26 - 30, 2025

Carlton Fields on

U.S. Eleventh Circuit Court of Appeals - Hamilton v. US Att’y Gen - immigration... Florida Supreme Court - Tallahassee - In re R Reg Fla Bar - amended rules...more

Jenner & Block

Inter Partes Review Invalidity Finding Does Not Collaterally Estopell Assertion of Unchallenged Claims in Same Patent

Jenner & Block on

In a February 10, 2025 order, the Federal Circuit Court of Appeals rejected the application of the collateral estoppel doctrine to patent claims asserted in a district court infringement action where other claims in the same...more

Akin Gump Strauss Hauer & Feld LLP

Federal Circuit: PTAB Decision of Invalidity Cannot Estop District Court Litigation on Different Claims from the Same Patent, Even...

The Federal Circuit recently refused to apply collateral estoppel to claims of a patent asserted in district court litigation based on a Patent Trial and Appeal Board (PTAB) decision finding similar claims from the same...more

Marshall Dennehey

Pennsylvania Supreme Court Clarifies Clear and Convincing Standard in Attorney Disciplinary Cases

Marshall Dennehey on

In the recent disciplinary matter of ODC v. Anonymous, 2025 WL 524221 (Pa. Feb. 12, 2025), the Pennsylvania Supreme Court established the standard applicable to attorney disciplinary matters, expressly holding that the...more

Jones Day

Federal Circuit Reverses District Court’s Application Of Collateral Estoppel

Jones Day on

Kroy IP Holdings, LLC sued Groupon, Inc., alleging infringement of 13 claims of U.S. Patent No. 6,061,660 (“’660 patent’), which relates to incentive programs over computer networks. Those claims were invalidated via...more

Spilman Thomas & Battle, PLLC

Subcontracting Lessons on Indemnity Provisions, Consistency of Contract Terms and Estoppel From the SC Court of Appeals

The Retreat at Charleston National Country Club Home Owners Ass’n, Inc. v. Winston Carlyle Charleston National, LLC, S.C. App. Case No. 2021-001050, Opinion No. 6099 (Feb. 12, 2025) Key Takeaways: Case Summary (for those of...more

Sunstein LLP

Collateral (Patent) Damage Undone by Federal Circuit?

Sunstein LLP on

In Kroy IP Holdings v. Groupon, The Federal Circuit issued a decision that should come as a comfort to patent owners, addressing the interplay between decisions of the Patent Trial and Appeal Board (“PTAB”) in inter partes...more

Carlton Fields

Florida Appeals Court Decisions Week of March 24 - 28, 2025

Carlton Fields on

U.S. Eleventh Circuit Court of Appeals  - USA v. Murat - sentencing - Johnson v. Fla DOC - Confrontation Clause, medical report - US Sugar v. US Army Corp of Eng’rs - administrative challenge, Everglades...more

Vorys, Sater, Seymour and Pease LLP

The Precedent: The Federal Circuit Clarifies When Collateral Estoppel Applies Following Inter Partes Review Proceedings in Kroy IP...

In this edition of The Precedent, we outline the Federal Circuit's decision in Kroy IP Holdings, LLC v. Groupon, Inc. Overview - The Federal Circuit held that the Patent Trial and Appeal Board’s (PTAB) finding of...more

Knobbe Martens

Federal Circuit Review | February 2025

Knobbe Martens on

In HD Silicon Solutions LLC V. Microchip Technology Inc., Appeal No. 23-1397, the Federal Circuit held that  all but one patent claim were invalid as obvious because the claimed material, as properly construed, was disclosed...more

Adams & Reese

South Carolina Ruling Has Major Implications on Indemnity Provisions and Collateral Estoppel

Adams & Reese on

South Carolina contractors need to be aware of a recent decision by the South Carolina Court of Appeals that clarifies the landscape for indemnity provisions in contracts and introduces critical consideration regarding the...more

Hudnell Law Group

Differing Burdens of Proof Limits Estoppel Effect of PTAB Final Written Decision

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On February 10, 2025, the United States Court of Appeals for the Federal Circuit issued a decision in Kroy IP Holdings, LLC v. Groupon, Inc., reversing and remanding a district court ruling that had dismissed Kroy’s patent...more

McDermott Will & Schulte

Collateral Estoppel Doesn’t Apply to Unchallenged IPR Claims

The US Court Appeals for the Federal Circuit found that despite a Patent Trial & Appeal Board determination that certain challenged patent claims were unpatentable based on a preponderance of the evidence standard, the patent...more

WilmerHale

Federal Circuit Patent Watch: Federal Circuit Orders Remanded Case Reassigned to New Judge, Finding That Trial Judge’s Statements...

WilmerHale on

Precedential and Key Federal Circuit Opinions - HD SILICON SOLUTIONS LLC v. MICROCHIP TECHNOLOGY INC. [OPINION] (2023-1397, 2/6/2025) (Lourie, Stoll, Cunningham) - Lourie, J. The Board affirmed the Final Written...more

Fitch, Even, Tabin & Flannery LLP

Federal Circuit Clarifies Patent Claim Assertion After PTAB Unpatentability Decisions

On February 10, the Federal Circuit held in Kroy IP Holdings, LLC v. Groupon, Inc. that a final written decision of the Patent Trial and Appeal Board (PTAB) concluding that certain claims are unpatentable does not prevent the...more

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