Patent 11520377
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.
Current assignee: Lepton Computing LLC
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
As of today, June 1, 2026, there are no AIA trial proceedings (Inter Partes Review, Post-Grant Review, or Covered Business Method review) on file for US Patent 11520377 according to the USPTO Open Data Portal API and supplemental web searches. This indicates that the patent has not yet been challenged in an AIA trial at the PTAB.
Strategic summary
Currently, all claims of US11520377 remain untested in AIA trial proceedings at the PTAB. This means that claims 1-19 are neither canceled nor sustained by a PTAB Final Written Decision.
Since no AIA trials have been initiated, there is no estoppel landscape established under 35 U.S.C. § 315(e)(2). Therefore, all potential prior art grounds, including those under 35 U.S.C. § 102 (novelty), § 103 (obviousness), and § 112 (written description/enablement for PGR/CBM), are still available for a defendant to assert in a future PTAB petition or district court litigation.
There is no pattern of filings by petitioners or patent owner appeals to the Federal Circuit regarding PTAB decisions for this patent, as no such decisions exist.
Recommended next steps
Since no PTAB activity exists for US11520377, the absence of challenges is itself a signal. For a defendant facing assertion of this patent, the recommended next steps would be:
- Conduct a thorough prior art search: A comprehensive search for prior art relevant to claims 1-19 should be undertaken to identify strong invalidity contentions.
- Evaluate potential PTAB petitions: Based on the prior art search, assess the viability of filing an Inter Partes Review (IPR) petition (for § 102 and § 103 grounds) or, if applicable, a Post-Grant Review (PGR) petition (for a broader range of grounds, including § 112, if the patent was granted on an application filed on or after March 16, 2013, and the petition is filed within 9 months of grant). The filing date of this patent (August 23, 2021) makes it eligible for PGR.
- Monitor for future PTAB filings: Stay vigilant for any newly filed PTAB petitions against US11520377 by other parties, as such filings could provide valuable insights or create estoppel for those petitioners.
Generated 6/1/2026, 6:47:44 AM