- Filed
- Jul 6, 2026
- Last modified
- Jul 7, 2026
- Petitioner
- FENUN Inc., et al.
- Inventor
- TIEQIANG TANG
Patent 12433239
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
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Proceedings on file (1)
All PTAB activity →AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.
1 active
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
✓ Generated
Proceedings overview
There is one active AIA trial proceeding on US Patent 12433239, which is a Post-Grant Review (PGR) that was filed on 2026-07-06 and is currently pending. The patent's claims remain untested and in full force from a PTAB perspective, meaning a defendant currently facing assertion of this patent will need to develop their own invalidity arguments.
PGR2026-00066 — FENUN Inc., et al. v. PetPivot Inc.
- Type: Post-Grant Review
- Filed: 2026-07-06
- Status: Pending
- Judge panel: Not yet public.
- Petition grounds: Not yet public.
- Institution decision: Not yet available. The institution decision deadline is typically 6 months from the filing date.
- Final Written Decision: Not yet applicable.
- Settlement / termination: Not yet applicable.
- Appeal: Not yet applicable.
- Defensive value: This proceeding is in its very early stages. Until an institution decision is made and, if instituted, a Final Written Decision is issued, all claims of US12433239 remain in their original form. A defendant should monitor this proceeding closely as its outcome could significantly impact the patent's enforceability.
Strategic summary
Currently, all claims of US Patent 12433239 are UNTESTED by any PTAB Final Written Decision. The sole proceeding, PGR2026-00066, is a Post-Grant Review that was only filed yesterday, 2026-07-06, and is still pending an institution decision. This means there is no estoppel landscape established yet, and all prior-art grounds are potentially available to a defendant. The patent owner, PetPivot Inc., has not yet had to defend its claims at the PTAB. The petitioner, FENUN Inc., et al., is a new entity in the context of this patent, and there is no pattern of multiple IPRs or aggressive PTAB appeals by the patent owner at this time.
Recommended next steps
If you are a defendant facing assertion of US12433239 today, it is crucial to monitor PGR2026-00066. The institution decision deadline for this PGR will be around 2027-01-06 (six months from the filing date). If the PGR is instituted, a Final Written Decision would typically be due one year after institution. Given the early stage of this proceeding, you would need to develop your own invalidity defenses, but the outcome of PGR2026-00066 could provide valuable insights or alter the status of the asserted claims.
Generated 7/7/2026, 6:01:44 AM