9917856

Initially, a judgment was issued in favor of Centripetal Networks finding Cisco willfully infringed four patents, including US9917856. This verdict was later vacated by the Federal Circuit due to a conflict of interest, and the case was remanded. The district court administratively closed the case in July 2025, pending appeals.

Palo Alto Networks filed an Inter Partes Review challenging claims 1, 24, and 25 of US9917856. After an appeal and remand by the Federal Circuit, a new PTAB panel issued a Final Written Decision on Remand, again finding the challenged claims unpatentable as obvious.

Cisco Systems filed this IPR, which was joined with IPR2022-00182. The PTAB issued a Final Written Decision On CAFC Remand for this joined case.

Keysight Technologies filed this IPR, which was joined with IPR2022-00182. The PTAB issued a Final Written Decision On CAFC Remand for this joined case.

Centripetal Networks appealed the PTAB's initial decision in IPR2022-00182 (and related IPRs) concerning US9917856. The Federal Circuit vacated the decision and remanded the case for further proceedings, citing the PTAB's failure to adequately consider evidence of copying.

Centripetal Networks filed a petition for a writ of mandamus seeking to direct the PTAB to vacate institution decisions related to US9917856 based on recusal issues, which the Federal Circuit denied.

A motion for judgment on the pleadings on the basis of patent ineligibility for US9917856 was denied in September 2018, as disputed issues of fact existed. This case appears to be related to or preceding the 2:18-cv-00094 case.