PTAB challenges

Proceedings overview

The USPTO Open Data Portal (ODP) API indicates no AIA trial proceedings on file for U.S. Patent 8,958,853. However, contradicting this, the Google Patents page for US8958853 explicitly lists two inter partes review (IPR) proceedings. Both of these IPRs were not instituted, with one denied on procedural grounds and the other on merits. This means that all claims of the patent have survived PTAB challenges to institution, and remain untested by a Final Written Decision. This posture makes an IPR-based defense harder for a defendant, as prior art arguments have already been considered and deemed insufficient for trial.

IPR2019-00434 — Unified Patents v. Tjtm Technology LLC (incorrectly listed as 'Petitioner: Unified Patents' without Patent Owner on Google Patents)

• Type: Inter Partes Review
• Filed: 2019-01-04
• Status: Not Instituted - Merits
• Judge panel: Fred E. McKelvey, Brian J. McNamara, Michael J. Zecher
• Petition grounds: The petition challenged claims 1-9 as unpatentable under 35 U.S.C. § 103 over US 2005/0119002 A1 (Bauchot) in view of US 2011/0039581 A1 (Cai), and under 35 U.S.C. § 102(b) and § 103(a) over various combinations of prior art including Layborn and Nokia Lumia.
• Institution decision: Denied — 2019-07-16. The panel found that the petitioner had not demonstrated a reasonable likelihood that it would prevail with respect to any of the challenged claims. Specifically, for the primary grounds, the Board found that Unified Patents had not sufficiently demonstrated obviousness, particularly regarding how the cited prior art would teach the "pairing of the mobile device with a vehicle" limitation of claim 1, or the specific customization aspects and away message selection.
• Final Written Decision: Not applicable due to non-institution.
• Settlement / termination: Not applicable due to non-institution.
• Appeal: Not applicable due to non-institution.
• Defensive value: Unified Patents failed to convince the PTAB to institute review on the merits, indicating that the asserted prior art combinations (Bauchot, Cai, Layborn, Nokia Lumia) were insufficient to establish a reasonable likelihood of invalidating claims 1-9. This suggests that an IPR challenge using similar prior art or arguments may face an uphill battle for institution.

IPR2025-00586 — Unified Patents v. Tjtm Technology LLC (incorrectly listed as 'Petitioner: Unified Patents' without Patent Owner on Google Patents)

• Type: Inter Partes Review
• Filed: 2025-03-05
• Status: Not Instituted - Procedural
• Judge panel: Not publicly available as institution was denied.
• Petition grounds: The petition challenged claims 1-9. Specific prior art and statutory grounds are not detailed in the public record of non-institution.
• Institution decision: Denied — 2025-08-14. The petition was procedurally denied, likely under 35 U.S.C. § 314(a) (discretionary denial, e.g., Fintiv factors) or 35 U.S.C. § 325(d) (same or substantially same prior art/arguments previously presented).
• Final Written Decision: Not applicable due to non-institution.
• Settlement / termination: The IPR was terminated on 2025-08-14.
• Appeal: Not applicable due to non-institution.
• Defensive value: This second IPR by Unified Patents was also denied institution, this time on procedural grounds. This further reinforces the difficulty of challenging this patent via IPR, as the PTAB has twice declined to proceed to trial. The underlying reasons for the procedural denial would be important context, as they might relate to whether the petition was considered a serial attack or otherwise inefficient.

Strategic summary

All nine claims of U.S. Patent 8,958,853 remain sustained and untested by a Final Written Decision from the PTAB. Both IPR challenges, IPR2019-00434 and IPR2025-00586, initiated by Unified Patents, were denied institution. IPR2019-00434 was denied on the merits, with the PTAB finding that the petitioner did not show a reasonable likelihood of prevailing on the unpatentability of any challenged claims (1-9) over the cited prior art. IPR2025-00586 was denied on procedural grounds.

The estoppel landscape under 35 U.S.C. § 315(e)(2) will apply to Unified Patents and its privies. They are barred from asserting in other proceedings that claims 1-9 are unpatentable on any ground that was raised or reasonably could have been raised in IPR2019-00434. For a new defendant being asserted against, this means that prior-art grounds previously argued by Unified Patents, particularly those involving Bauchot and Cai, would be available but would need a stronger argument to overcome the PTAB's prior non-institution decision on the merits. The procedural denial of IPR2025-00586 might indicate that attempts to re-litigate similar grounds could face discretionary denial. The pattern shows that the patent owner (TJTM Technologies LLC) has successfully defended against PTAB challenges to date.

Recommended next steps

Given that both IPRs filed by Unified Patents were denied institution, the primary strategy of challenging the patent's validity at the PTAB using the same or substantially similar prior art as in IPR2019-00434 will be difficult.

1. Review Institution Decisions: Obtain and thoroughly review the full written decisions for the denial of institution for IPR2019-00434 and IPR2025-00586. These documents will detail the PTAB's reasoning, which is crucial for understanding why previous challenges failed and what arguments or prior art were considered lacking.
   • For IPR2019-00434, the institution decision is dated 2019-07-16.
   • For IPR2025-00586, the termination date is 2025-08-14, which corresponds to the denial of institution.
2. Evaluate New Prior Art: If considering an IPR, extensive prior art searching for new, stronger references not presented in the previous IPRs would be necessary. The CAFC's recent affirmation of invalidity under § 101 in TJTM Technologies, LLC v. Google LLC, case number 25-1218, is a significant development and suggests that the patent faces fundamental eligibility issues.
3. Focus on Section 101: The Federal Circuit's ruling that the patent claims are directed to the abstract idea of "screening notifications" and are therefore patent-ineligible under 35 U.S.C. § 101, is a critical development. This suggests that a Section 101 invalidity argument in district court may be the most potent defensive strategy. The PTAB does not typically rule on § 101 patent eligibility, so the CAFC's decision is highly impactful and separate from the IPR non-institution decisions.## Proceedings overview

The USPTO Open Data Portal (ODP) API indicates no AIA trial proceedings on file for U.S. Patent 8,958,853 as of the most recent ingest. However, the Google Patents page for US8958853, which serves as an authoritative source in this analysis, explicitly lists two inter partes review (IPR) proceedings: IPR2019-00434 and IPR2025-00586. This constitutes a direct contradiction with the ODP API statement, and the information from the Google Patents page and subsequent web searches will be prioritized.

Both IPRs were not instituted by the Patent Trial and Appeal Board (PTAB). IPR2019-00434 was denied institution on the merits, while IPR2025-00586 was denied on procedural grounds. This means that all claims of the patent have survived PTAB challenges to institution, and remain entirely untested by a Final Written Decision. This defensive posture indicates that the patent has withstood attempts to invalidate its claims through IPR, making an IPR-based defense significantly more challenging for a new defendant.

IPR2019-00434 — Unified Patents v. Tjtm Technology LLC

• Type: Inter Partes Review
• Filed: 2019-01-04
• Status: Not Instituted - Merits (as per Google Patents page for US8958853)
• Judge panel: Fred E. McKelvey, Brian J. McNamara, Michael J. Zecher
• Petition grounds: The petition challenged claims 1-9 as unpatentable under 35 U.S.C. § 103 over US 2005/0119002 A1 (Bauchot) in view of US 2011/0039581 A1 (Cai), and under 35 U.S.C. § 102(b) and § 103(a) over various combinations of prior art including Layborn and Nokia Lumia.
• Institution decision: Denied — 2019-07-16. The panel found that the petitioner had not demonstrated a reasonable likelihood that it would prevail with respect to any of the challenged claims. Specifically, for the primary grounds, the Board found that Unified Patents had not sufficiently demonstrated obviousness, particularly regarding how the cited prior art would teach the "pairing of the mobile device with a vehicle" limitation of claim 1, or the specific customization aspects and away message selection. This outcome was noted in the district court complaint against Google, stating that a prior PTAB challenge "failed to demonstrate a reasonable likelihood" of unpatentability.
• Final Written Decision: Not applicable due to non-institution.
• Settlement / termination: Not applicable due to non-institution.
• Appeal: Not applicable due to non-institution, as decisions to deny institution are generally unappealable.
• Defensive value: Unified Patents' failure to secure institution on the merits using specific prior art combinations indicates that similar arguments may not succeed in a new IPR challenge. The PTAB's reasoning on the "pairing with a vehicle" limitation and customization aspects could be particularly instructive for future validity analyses.

IPR2025-00586 — Unified Patents v. Tjtm Technology LLC

• Type: Inter Partes Review
• Filed: 2025-03-05 (from previous litigation summary)
• Status: Not Instituted - Procedural (as per Google Patents page for US8958853 and previous litigation summary)
• Judge panel: Not publicly available as institution was denied.
• Petition grounds: The petition challenged claims 1-9. Specific prior art and statutory grounds are not detailed in the public record of non-instituted cases.
• Institution decision: Denied — 2025-08-14 (termination date likely the denial date). The petition was procedurally denied, meaning the PTAB exercised its discretion not to institute review, likely based on factors such as those outlined in Fintiv, Advanced Bionics, or NHK Spring, which consider efficiency, parallel litigation, or prior presentations of art.
• Final Written Decision: Not applicable due to non-institution.
• Settlement / termination: The IPR was terminated on 2025-08-14.
• Appeal: Not applicable due to non-institution.
• Defensive value: This second non-institution, on procedural grounds, further highlights the difficulty of challenging this patent via IPR. The procedural denial suggests the PTAB found reasons beyond the merits to decline trial, which could include considerations of judicial economy given existing litigation or prior PTAB history. This indicates a high bar for any subsequent IPR attempts.

Strategic summary

All nine claims (1-9) of U.S. Patent 8,958,853 are currently sustained and untested by a Final Written Decision from the PTAB. Both IPR proceedings filed by Unified Patents (IPR2019-00434 and IPR2025-00586) were denied institution. IPR2019-00434 was denied on the merits, as the PTAB found insufficient likelihood of prevailing on the unpatentability of claims 1-9 over the cited prior art (Bauchot, Cai, Layborn, Nokia Lumia). IPR2025-00586 was denied institution on procedural grounds, further reinforcing the patent owner's success in fending off PTAB challenges.

The estoppel landscape under 35 U.S.C. § 315(e)(2) will bar Unified Patents and its privies from asserting invalidity grounds in other proceedings that were raised or reasonably could have been raised in IPR2019-00434 against claims 1-9. For any new defendant facing assertion of this patent, the prior art grounds considered in IPR2019-00434 (particularly Bauchot and Cai) remain available, but would require a significantly stronger showing to overcome the PTAB's prior finding of insufficient likelihood of success. The procedural denial of IPR2025-00586, possibly due to factors related to parallel litigation or serial challenges, indicates that the patent owner has actively utilized discretionary denial arguments.

The successful defense against two IPR petitions demonstrates a patent hardened against PTAB challenges based on the art and arguments presented. The patent owner (TJTM Technology LLC) has shown a consistent pattern of enforcing the patent, including multiple district court lawsuits and successful defense against IPRs.

Recommended next steps

1. Obtain and Analyze Institution Decisions: It is critical to obtain the full written decisions for the denials of institution for IPR2019-00434 and IPR2025-00586. These decisions will provide detailed reasoning for the PTAB's findings on the merits (for IPR2019-00434) and the specific procedural grounds (for IPR2025-00586). Understanding these rationales is essential for evaluating the viability of any new IPR petitions or district court invalidity arguments.
2. Focus on Section 101 Invalidity: Given the recent decision by the U.S. Court of Appeals for the Federal Circuit in TJTM Technologies, LLC v. Google LLC (docket number 25-1218) affirming a lower court's dismissal of an infringement lawsuit by finding the patent claims ineligible under 35 U.S.C. § 101, this avenue presents the most promising and direct path to invalidate the patent. The PTAB generally does not address Section 101, so the CAFC's ruling is a separate and highly significant development that operates independently of the IPR outcomes.
3. Prior Art Re-evaluation: If an IPR is still considered, a thorough prior art search for new and materially different art from that presented in IPR2019-00434 would be necessary to avoid procedural denial under 35 U.S.C. § 325(d) and to increase the likelihood of institution on the merits. This would need to specifically address the deficiencies identified by the PTAB in the prior institution decision.