PTAB Relies on Priority Analysis in a Related Proceeding in Denying IPR

Jan 17, 2018

Reading Time : 1 min

ESET argued that the claims of the ’086 Patent are obvious in view of several combinations of prior art references, primarily relying on a reference titled Proof-Carrying Code (“Necula”). In the 01444 proceeding, Finjan argued that FireEye had failed to establish that Necula antedated the priority date of the ’086 Patent. ESET argued that the ’086 Patent was not entitled to a priority date antedating Necula because none of the patents or patent applications from which the ’086 Patent claimed benefit disclosed the specific limitations claimed by the ’086 Patent. The PTAB stated that it had analyzed the claims of the ’926 Patent in the 00145 proceeding and sided with the patent owner, finding that the disclosure provided sufficient written-description support. The PTAB noted that the claims of the ’086 Patent at issue contained limitations that were nearly identical to those of the ’926 Patent. For example, Claim 1 of the ’926 Patent recites “appending a representation of the retrieved Downloadable security profile data to the incoming Downloadable, to generate and appended Downloadable,” and Claim 1 of the ’086 Patent recites the same limitation without the words “retrieved” and “incoming”.

Given that the claim language of the ’926 Patent was nearly identical to that of the ’086 Patent, the PTAB held that the ’086 Patent shares essentially the same disclosure as the ’926 Patent. The PTAB also noted that the ’086 Patent incorporates the ’926 Patent by reference. The PTAB therefore denied ESET’s petition and joinder motion.

ESET, LLC v. Finjan, Inc., IPR2017-01969, Paper No. 8 (PTAB January 9, 2018).

Share This Insight

Previous Entries

IP Newsflash

December 5, 2025

District courts are split on whether a complaint can provide the required knowledge for post-suit indirect and willful infringement in that same lawsuit. Chief Judge Connolly in the District of Delaware recently confirmed that, consistent with his prior opinions, the complaint cannot serve as the basis for knowledge for either a claim of post-suit indirect infringement or a demand for willfulness-based enhanced damages in that lawsuit.

...

Read More

IP Newsflash

December 3, 2025

The Federal Circuit recently held that a patentee acted as its own lexicographer to define a claim term even though it did not explicitly define the term. Rather, because the patentee consistently and clearly used two terms interchangeably to describe the same structural feature and did so in all of the embodiments in which the feature appeared, the patentee impliedly gave the term its own, unique definition.

...

Read More

IP Newsflash

December 2, 2025

The Federal Circuit recently held an asserted patent was not entitled to its priority date because the priority application lacked written description support for the asserted claims. In so doing, the court explained that broad disclosures that do not provide reasonably specific support for narrower claims do not meet the written description requirement. The court also considered whether the inventor’s testimony showed they possessed the full scope of the claimed genus at the priority date or whether it was more likely the inventors first became aware of the claimed embodiments from public disclosures of the accused product.

...

Read More

IP Newsflash

December 1, 2025

In a Hatch-Waxman case, the District of Delaware denied a motion for summary judgment seeking to apply the ANDA filing date as the date of the hypothetical negotiation used to calculate reasonable royalty damages. Instead, the court determined that the appropriate date to use for the hypothetical negotiation is the launch date.

...

Read More

© 2025 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.