PTAB challenges

Proceedings overview

There has been one AIA trial proceeding filed against US Patent 11,012,827. This proceeding resulted in institution being denied, meaning all challenged claims were sustained. This outcome strengthens the patent's defensive posture for a defendant, as the challenged claims have survived an IPR attempt.

IPR2026-00109 — [Apple Inc.](/litigations/by-plaintiff/Apple%20Inc.) v. Rembrandt Messaging Technologies LP

• Type: Inter Partes Review
• Filed: 2025-11-04
• Status: Institution Denied. The petition was denied institution on May 15, 2026.
• Judge panel: The judge panel was APJ Beverly M. I. W. Goodwin, APJ Stephen P. Thayer, and APJ Brian P. Murphy.
• Petition grounds: Apple Inc. challenged claims 1-28 of US Patent 11,012,827 as unpatentable under 35 U.S.C. § 103 over the combination of US 2007/0270146 (Merrett) and US 2006/0073837 (Rao).
• Institution decision: Denied on 2026-05-15. The panel found that the petition failed to demonstrate a reasonable likelihood that Apple would prevail in showing the unpatentability of any challenged claim. Specifically, the Board determined that Apple's petition did not sufficiently articulate how the combination of Merrett and Rao would render the claims obvious, particularly regarding the specific steps of dynamic random number generation and its use in message forwarding while maintaining user privacy.
• Final Written Decision (if issued): Not applicable, as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: Not applicable, as institution was denied.
• Defensive value: The patent owner successfully defended against an IPR challenge to claims 1-28. This means that these claims are currently considered patentable over the specific prior art and arguments presented by Apple. Any future IPR attempt against these claims would likely need to present new prior art or significantly different arguments.

Strategic summary

All claims (1-28) of US Patent 11,012,827 that were challenged in IPR2026-00109 are now sustained due to the denial of institution. The Board found Apple's arguments for obviousness under § 103, based on Merrett and Rao, unpersuasive for claims 1-28. Claims 29 and 30 were not challenged in this IPR and thus remain untested.

The estoppel landscape for this patent is relatively favorable for the patent owner, given the denial of institution. Apple Inc. (and its privies) are barred under § 315(e)(2) from raising the specific grounds (claims 1-28 under § 103 over Merrett and Rao) that were raised or reasonably could have been raised in IPR2026-00109. This means a defendant that is a privy to Apple Inc. could not re-litigate these specific obviousness grounds at the PTAB. Other prior art grounds or different statutory bases (§ 102 or § 112) for claims 1-28, or any grounds for claims 29 and 30, would theoretically still be available for a new petitioner.

A pattern signal from this proceeding is the denial of institution, which indicates that the challenged claims have some robustness, at least against the specific combination of prior art presented. It also shows the patent owner, Rembrandt Messaging Technologies LP, successfully defended against this challenge. Unified Patents, a defensive aggregator, has filed a PTAB case (IPR2026-00109), as noted in the patent's Google Patents listing, but the detailed proceedings information explicitly names Apple Inc. as the petitioner, indicating a direct challenge by a potential implementer rather than solely by Unified Patents itself.

Recommended next steps

The institution of IPR2026-00109 was denied, meaning all challenged claims (1-28) of US11012827 remain patentable. For any defendant facing assertion of this patent, this outcome suggests that the specific obviousness argument combining Merrett and Rao against claims 1-28 is unlikely to succeed at the PTAB.

The full details of the institution denial are publicly available on the USPTO PTAB E2E system. You can review the "Decision Denying Institution" for IPR2026-00109 for the panel's detailed reasoning.