Patent 10912321
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 (0)
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.
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
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.
Proceedings overview
The USPTO Open Data Portal API indicates no AIA trial proceedings on file for U.S. Patent 10,912,321 as of the most recent ingest. Despite a web search for relevant PTAB activity, no specific Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) proceedings directly related to US Patent 10,912,321 were identified. This means that, based on available public records, the patent has not been subjected to PTAB challenges.
Strategic summary
As no PTAB proceedings have been identified for U.S. Patent 10,912,321, all claims of the patent are currently untested by these specific administrative review processes. There is no estoppel landscape established through PTAB proceedings, meaning a potential defendant would have a full range of prior-art grounds available for an IPR petition, should they choose to file one. The absence of PTAB activity suggests that the patent has not yet faced a direct challenge under AIA trial procedures, which is common for patents that have not been extensively asserted or have not drawn significant attention from defensive aggregators.
Recommended next steps
Since no PTAB activity is currently on file for U.S. Patent 10,912,321, if you are a defendant facing assertion of this patent, consider the following:
- Prior Art Search: Conduct a thorough prior art search to identify any strong invalidity arguments that could form the basis of an IPR or PGR petition.
- Validity Analysis: Engage patent counsel to conduct a detailed validity analysis of the asserted claims, considering both the prior art identified and the recent Federal Circuit ruling regarding indefiniteness of the term "about" for pH ranges. While the CAFC ruling pertains to a different pH range (7.6-10), its reasoning regarding indefiniteness of "about" may be relevant to the claims' broader pH range of "about 6 to about 9."
- PTAB Petition: If strong grounds are identified, filing an IPR or PGR petition could be a viable defense strategy to challenge the patent's validity.
Generated 5/29/2026, 9:04:04 PM