Citing Lack of Clarity and Differing Standards Applied By District Courts, Delaware Chief Judge Stark Invalidates Two Patents But Declines to Decide Which Burden of Proof Applies in the Section 101 Context

Apr 22, 2015

Reading Time : 1 min

The court noted that although patent eligibility under 35 U.S.C. § 101 is an issue of law, “there is no clarity at this time as to the standard of proof that must be applied to factual disputes that may be intertwined with the issue of eligibility of a particular patent or claim.”  Id. at 9. In fact, Districts have applied different standards in addressing patent-eligibility under § 101 – some have treated the issue solely as a question of law, while others have applied a clear and convincing evidentiary burden. See id. at 10-11. The court declined to resolve the dispute over the standard of proof required to invalidate a claim under § 101, but instead explained that the ’050 and ’142 patents are patent ineligible even assuming the court must apply a clear and convince standard.  

Intellectual Ventures I LLC v. Symantec Corp., No. 10-1067-LPS, in the District of Delaware (Apr. 22, 2015).

Share This Insight

Previous Entries

IP Newsflash

December 18, 2025

The Federal Circuit recently vacated a $20 million jury verdict in favor of a patentee and remanded with instructions to dismiss the case for lack of subject matter jurisdiction, finding that the patentee did not own the asserted patents at the time it filed suit and therefore lacked standing.

...

Read More

IP Newsflash

December 17, 2025

The Federal Circuit recently affirmed a Patent Trial and Appeal Board decision finding claims that had been subject to an ex parte reexamination unpatentable. As a threshold issue, the court held that IPR estoppel under 35 USC § 315(e)(1) does not apply to ongoing ex parte reexaminations. Accordingly, the Patent Office did not err in continuing the reexamination after issuing final written decisions in co-pending IPRs.

...

Read More

IP Newsflash

December 15, 2025

The District of Delaware recently denied a defendant’s motion to dismiss plaintiff’s demand for enhanced damages based on willful infringement pursuant to 35 U.S.C. § 284, explaining that neither a demand for damages under § 284 nor an accusation of willful infringement amount to a claim for relief that can be subject to dismissal under Rule 12(b)(6).

...

Read More

IP Newsflash

December 9, 2025

The Federal Circuit recently denied a petition for a writ of mandamus that challenged the PTO Director’s reliance on “settled expectations” to discretionarily deny two inter partes review (IPR) petitions. In so doing, the court explained that, while it was not deciding whether the Director’s use of “settled expectations” was correct, the petitioner’s arguments about what factors the Director may consider when deciding whether to institute an IPR or post-grant review (PGR) are not generally reviewable and did not provide sufficient basis for mandamus review here.

...

Read More

© 2026 Akin Gump Strauss Hauer & Feld LLP. All rights reserved. Attorney advertising. This document is distributed for informational use only; it does not constitute legal advice and should not be used as such. Prior results do not guarantee a similar outcome. Akin is the practicing name of Akin Gump LLP, a New York limited liability partnership authorized and regulated by the Solicitors Regulation Authority under number 267321. A list of the partners is available for inspection at Eighth Floor, Ten Bishops Square, London E1 6EG. For more information about Akin Gump LLP, Akin Gump Strauss Hauer & Feld LLP and other associated entities under which the Akin Gump network operates worldwide, please see our Legal Notices page.