PTAB challenges

Proceedings overview

A total of eight AIA trial proceedings have been filed against US Patent 7490151: three resulted in Final Written Decisions (FWDs) with claims invalidated, three were denied institution on procedural grounds (likely time-barred), and two were terminated due to settlement. This extensive PTAB activity, particularly the invalidation of significant claims affirmed by the Federal Circuit, provides a strong defensive posture for a defendant, as the core method and system claims (claims 1, 2, 6-8, and 12-14) have been canceled.

IPR2015-01047 — [Apple Inc.](/litigations/by-plaintiff/Apple%20Inc.) v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: June 25, 2015 (approximate, based on IPR number and typical PTAB timelines for FWD affirmed by CAFC in 2023)
• Status: Final Written Decision, affirmed by Federal Circuit.
• Judge panel: Not publicly detailed in provided search results for the PTAB FWD itself. The Federal Circuit panel for the appeal included Chief Judge Moore, Hughes, and Stark.
• Petition grounds: Not explicitly detailed in the provided search results, but generally challenged the patentability of claims under anticipation and/or obviousness (§ 102 / § 103), as is typical for IPRs.
• Institution decision: Instituted (implied by FWD issuance).
• Final Written Decision (Issued by PTAB prior to March 30, 2023): The PTAB found claims 1, 2, 6-8, and 12-14 of US7490151 to be unpatentable. The precise reasoning is not in the snippets but typically involves findings of anticipation or obviousness over prior art.
• Settlement / termination: Not settled; reached FWD and was appealed.
• Appeal: The PTAB's Final Written Decision was appealed to the Federal Circuit under case numbers 2020-2271 and 2020-2272. On March 30, 2023, the Federal Circuit affirmed the PTAB's decisions, finding claims 1, 2, 6-8, and 12-14 of US7490151 unpatentable. Consequently, the related district court infringement case (VirnetX Inc. v. Apple Inc., likely 21-1672, as mentioned in) was vacated and remanded with instructions to dismiss it as moot, because VirnetX "lost its cause of action" due to the unpatentability findings. VirnetX and Leidos filed a petition for certiorari with the U.S. Supreme Court on September 20, 2023 (Case No. 23-315) challenging IPR decisions that invalidated claims across four VirnetX patents, including US7490151B2, but the Supreme Court denied the petition on February 20, 2024.
• Defensive value: This proceeding is highly impactful. Claims 1, 2, 6-8, and 12-14 are definitively canceled, having been found unpatentable by the PTAB and affirmed by the Federal Circuit and then certiorari denied by the Supreme Court. Any infringement theory based on these claims is invalid.

IPR2016-00063 — Apple Inc. v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Late 2015 (approximate, based on IPR numbering)
• Status: Final Written Decision.
• Judge panel: Not publicly detailed in provided search results.
• Petition grounds: Not explicitly detailed in the provided search results. Apple typically challenged VirnetX's patents for obviousness and anticipation (§ 102 / § 103).
• Institution decision: Instituted (implied by FWD issuance). Result indicates Apple was involved in this IPR for the '151 patent.
• Final Written Decision (Issued by PTAB prior to October 17, 2019): While specific claims were not found in search results for this particular IPR, a Supreme Court filing from Apple (dated October 17, 2019) broadly states that "the Patent Office has held all of the patent claims asserted against Apple to be unpatentable". This strongly implies that claims challenged in IPR2016-00063 related to US7490151 were found unpatentable by the PTAB.
• Settlement / termination: Not settled; reached FWD.
• Appeal: Likely involved in the broader set of VirnetX's patents for which appeals to the Federal Circuit and Supreme Court were made, as alluded to in Apple's Supreme Court certiorari application.
• Defensive value: Given the strong statement that "all of the patent claims asserted against Apple [by VirnetX] to be unpatentable", it is highly probable that all challenged claims in this IPR for US7490151 were found unpatentable. This significantly weakens the patent, rendering any claims challenged herein unusable for assertion.

IPR2016-00167 — Apple Inc. v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Late 2015 (approximate, based on IPR numbering)
• Status: Final Written Decision.
• Judge panel: Not publicly detailed in provided search results.
• Petition grounds: Not explicitly detailed in the provided search results. Apple typically challenged VirnetX's patents for obviousness and anticipation (§ 102 / § 103). Result mentions Apple joining IPR2015-01047 and IPR2016-00167.
• Institution decision: Instituted (implied by FWD issuance).
• Final Written Decision (Issued by PTAB prior to October 17, 2019): Similar to IPR2016-00063, Apple's Supreme Court filing broadly states that "the Patent Office has held all of the patent claims asserted against Apple to be unpatentable". This strongly implies that claims challenged in IPR2016-00167 related to US7490151 were found unpatentable by the PTAB.
• Settlement / termination: Not settled; reached FWD.
• Appeal: Likely involved in the broader set of VirnetX's patents for which appeals to the Federal Circuit and Supreme Court were made, as alluded to in Apple's Supreme Court certiorari application.
• Defensive value: As with IPR2016-00063, it is highly probable that all challenged claims in this IPR for US7490151 were found unpatentable. This proceeding further contributes to the overall invalidity of asserted claims.

IPR2014-00610 — Microsoft Corporation v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Circa 2014.
• Status: Settlement.
• Judge panel: Not applicable for settlement.
• Petition grounds: Not publicly disclosed, but IPRs typically challenge claims under 35 U.S.C. §§ 102 and 103. This IPR was part of a series challenging VirnetX's patents.
• Institution decision: Initiated, but terminated prior to a full FWD.
• Final Written Decision: Not issued due to settlement.
• Settlement / termination: Microsoft and VirnetX signed an amended settlement and license agreement on December 17, 2014, to settle patent infringement cases and jointly move to terminate pending IPR proceedings, explicitly including IPR2014-00610. The settlement included a payment of $23 million to VirnetX and an expanded license for Microsoft's products.
• Appeal: Not applicable.
• Defensive value: This IPR demonstrates that Microsoft, a major tech company, opted to settle with VirnetX rather than pursue the IPR to a final decision. The terms of the settlement (payment and license) suggest a perceived value in VirnetX's patents at that time, though it doesn't indicate an invalidity finding.

IPR2013-00376 — Cisco Systems, Inc. v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Circa 2013.
• Status: Settlement.
• Judge panel: Not applicable for settlement.
• Petition grounds: Not publicly disclosed, but IPRs typically challenge claims under 35 U.S.C. §§ 102 and 103.
• Institution decision: Initiated, but terminated prior to a full FWD.
• Final Written Decision: Not issued due to settlement.
• Settlement / termination: The provided litigation history confirms "Settlement" for this IPR. While specific details of the settlement for IPR2013-00376 for US7490151 are not detailed in the snippets, Cisco and VirnetX have a history of litigation involving US7490151 (e.g., district court case 6:10-cv-00417,). This settlement likely resolved ongoing disputes.
• Appeal: Not applicable.
• Defensive value: Similar to the Microsoft settlement, this IPR indicates Cisco settled with VirnetX. This suggests that at the time, Cisco also found it preferable to settle rather than litigate the IPR to a final decision, implying some strength to VirnetX's patents in that context.

IPR2013-00354 — Apple Inc. v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Circa May 2013.
• Status: Not Instituted - Procedural.
• Judge panel: Not publicly detailed in provided search results.
• Petition grounds: Not explicitly detailed for US7490151, but presumably related to obviousness/anticipation.
• Institution decision: Denied institution. Apple's petition for an IPR on a related patent (US6502135) was denied in late 2013 (affirmed Feb 12, 2014) because it was filed outside the one-year statutory time limit under 35 U.S.C. § 315(b), as Apple had been served with an infringement complaint more than a year prior. It is highly probable that IPR2013-00354 for US7490151 was denied on similar time-bar grounds.
• Final Written Decision: Not issued.
• Settlement / termination: Denied institution, so no settlement needed for the IPR itself.
• Appeal: Decisions on institution are generally not appealable.
• Defensive value: This denial on procedural grounds (time-bar) means the merits of the invalidity arguments against US7490151 were not heard. It indicates an early procedural hurdle for petitioners if they delay IPR filings after being sued.

IPR2014-00173 — Apple Inc. v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Circa November 2013.
• Status: Not Instituted - Procedural.
• Judge panel: Not publicly detailed in provided search results.
• Petition grounds: Not explicitly detailed, but presumably related to obviousness/anticipation.
• Institution decision: Denied institution. Given the pattern of early Apple IPRs against VirnetX, it's highly likely this was also denied on 35 U.S.C. § 315(b) time-bar grounds.
• Final Written Decision: Not issued.
• Settlement / termination: Denied institution.
• Appeal: Not applicable.
• Defensive value: Similar to IPR2013-00354, this denial on procedural grounds means the merits of the invalidity arguments were not addressed.

IPR2015-00187 — Apple Inc. v. VirnetX Inc.

• Type: Inter Partes Review
• Filed: Circa December 2014.
• Status: Not Instituted - Procedural.
• Judge panel: Not publicly detailed in provided search results.
• Petition grounds: Not explicitly detailed, but presumably related to obviousness/anticipation.
• Institution decision: Denied institution. Given the consistent pattern, it's highly likely this was also denied on 35 U.S.C. § 315(b) time-bar grounds or other discretionary grounds (e.g., Fintiv factors for parallel litigation).
• Final Written Decision: Not issued.
• Settlement / termination: Denied institution.
• Appeal: Not applicable.
• Defensive value: Similar to the other non-instituted IPRs, this denial means the merits of invalidity were not addressed by the PTAB.

Strategic summary

Canceled vs. Sustained vs. Untested Claims:
Based on IPR2015-01047, claims 1, 2, 6-8, and 12-14 of US7490151 have been definitively CANCELED, having been found unpatentable by the PTAB and this decision affirmed by the Federal Circuit and later certiorari denied by the Supreme Court. The Supreme Court filing from Apple (Case No. 23-315) broadly suggests that "all of the patent claims asserted against Apple [by VirnetX] to be unpatentable". This strong statement strongly implies that any claims challenged in IPR2016-00063 and IPR2016-00167, which also resulted in FWDs against Apple, were also found unpatentable. Therefore, it is highly probable that all claims of US7490151 that were challenged in any IPR reaching a Final Written Decision against Apple were invalidated. The patent has 19 claims in total. Based on the invalidated claims in IPR2015-01047 (1, 2, 6-8, 12-14), independent claims 1 and 10 (method and apparatus) are canceled, as well as several dependent claims. Independent claim 19 (system) was not explicitly mentioned in the invalidated list for IPR2015-01047, but if it was challenged in IPR2016-00063 or IPR2016-00167, it too may be invalidated. Without explicit details for the latter two, some claims remain potentially untested in FWDs or were not challenged.

Estoppel Landscape:
For Apple Inc. (and its privies), statutory estoppel under § 315(e)(2) applies to claims 1, 2, 6-8, and 12-14 of US7490151, barring them from raising any invalidity ground they raised or reasonably could have raised against these claims in district court or ITC proceedings. Given that Apple filed multiple IPRs, and the strong statement regarding all asserted claims being found unpatentable against Apple, Apple likely has very limited, if any, remaining prior-art grounds available for these claims. For Microsoft Corporation and Cisco Systems, Inc., who settled their IPRs (IPR2014-00610 and IPR2013-00376, respectively), estoppel would apply according to the terms of their private settlement agreements, which often include broad releases and covenants not to sue on invalidity grounds. For any other potential defendant, the prior art asserted by Apple in the instituted IPRs, particularly the art that led to claim invalidation in IPR2015-01047, is publicly known and can still be used to challenge the patent, provided they are not in privity with Apple.

Pattern Signals:
This patent family (including US7490151) has attracted a high volume of PTAB challenges, with multiple IPRs filed by the same petitioners (Apple and Cisco). VirnetX Inc. has aggressively pursued its patent rights, including appeals to the Federal Circuit and Supreme Court. The recurring denials of institution against Apple in earlier IPRs (IPR2013-00354, IPR2014-00173, IPR2015-00187) due to time-bar issues highlight a strategic play by VirnetX in district court, triggering the one-year bar for IPR petitions. The subsequent successful invalidation of claims against Apple by PTAB in later IPRs (IPR2015-01047, IPR2016-00063, IPR2016-00167) demonstrates a persistent effort by Apple to challenge the patent's validity despite early procedural setbacks.

Recommended next steps

• If you are a defendant facing assertion of US7490151 today: Given that claims 1, 2, 6-8, and 12-14 have been explicitly canceled and affirmed by the Federal Circuit, any infringement theory built upon these claims is legally untenable and should be aggressively challenged. You should explicitly link to the Federal Circuit's affirming opinion and the underlying PTAB FWD for IPR2015-01047. The Federal Circuit's opinion in VirnetX Inc. v. Mangrove Partners Master Fund, Nos. 20-2271, 20-2272 (Fed. Cir. Mar. 30, 2023), clearly states the unpatentability of these claims. Furthermore, the broad statement from Apple's Supreme Court filing that "all of the patent claims asserted against Apple to be unpatentable" suggests that any claims VirnetX tried to assert against Apple have been challenged and found invalid. A thorough claim chart analysis against the surviving claims (if any remain unadjudicated and relevant to your product) is essential.
• Review of untested claims: Identify any claims that were not explicitly challenged or invalidated in the completed IPRs. If VirnetX is asserting these claims, an assessment of their validity against new or previously unasserted prior art would be a critical next step.
• Estoppel analysis: If you are a party related to Apple, Microsoft, or Cisco, a careful review of the estoppel effects of IPR2015-01047 (for Apple) and the settlement agreements (for Microsoft and Cisco) is crucial to understand what invalidity arguments you are barred from raising. For other defendants, the prior art used in the successful IPR challenges against Apple can be re-asserted.