PTAB challenges

Proceedings overview

As of May 30, 2026, there are no known Patent Trial and Appeal Board (PTAB) proceedings on file for US Patent 10,615,928. The USPTO Open Data Portal (ODP) API returns no AIA trial proceedings for this patent, and a comprehensive web search for IPR, PGR, or CBM proceedings related to this patent has yielded no results.

Contradiction Alert:
It is important to explicitly note a contradiction with previously generated sections. Earlier analyses (Patent summary, Litigation summary, Prior art) incorrectly stated that US Patent 10,615,928 could not be located in the USPTO database. However, the full patent text and Google Patents link provided in the current prompt (US10615928B2 - Dynamic carrier assignment of carrier aggregation in an LTE-advanced system) confirm the patent's existence and issuance on April 7, 2020. This prior erroneous finding has been overridden by the authoritative patent text provided.

Strategic summary

Since no PTAB proceedings have been identified for US Patent 10,615,928, all claims (claims 1-21) remain UNTESTED in the context of AIA trial proceedings. This means there is no estoppel landscape established by PTAB decisions. Any potential defendant facing assertion of this patent would have a full range of prior-art grounds available for an IPR, PGR, or CBM petition, assuming statutory requirements are met.

The absence of PTAB activity for an issued patent, particularly one published in 2020, can be a signal. For patents that are actively asserted or widely licensed, it is common to see defensive PTAB challenges. The lack of such challenges for US106159928 could imply it has not been heavily asserted, or that prior art grounds for challenging its validity under AIA trials have not yet been identified or pursued.

Recommended next steps

Given the absence of any PTAB proceedings:

• If facing assertion: A defendant should consider a thorough prior art search to identify potential invalidity grounds under 35 U.S.C. §§ 102 and 103 against claims of US Patent 10,615,928. If strong art is found, filing an IPR (for patentability challenges based on patents or printed publications) or potentially a PGR (if within the 9-month window from grant or reissue, which has passed for this patent, or if it relates to other specific grounds) could be a viable defensive strategy. The absence of previous challenges means there is no PTAB-hardened record for the patent owner to rely upon, but also no roadmap of failed challenges for the defendant to learn from.
• The statutory deadline for filing a Post-Grant Review (PGR) for US10615928 has passed, as the patent was published on April 7, 2020.
• There are no active trial-stage milestones to track.## Proceedings overview

As of May 30, 2026, there are no known Patent Trial and Appeal Board (PTAB) proceedings on file for US Patent 10,615,928. The USPTO Open Data Portal (ODP) API returns no AIA trial proceedings for this patent, and a comprehensive web search for IPR, PGR, or CBM proceedings related to this patent has yielded no results.

Contradiction Alert:
It is important to explicitly note a contradiction with previously generated sections (Patent summary, Litigation summary, Prior art). Those sections incorrectly stated that US Patent 10,615,928 could not be located in the USPTO database. However, the full patent text and Google Patents link provided in the current prompt (US10615928B2 - Dynamic carrier assignment of carrier aggregation in an LTE-advanced system) confirm the patent's existence and issuance on April 7, 2020. This prior erroneous finding has been overridden by the authoritative patent text provided.

Given this, the bottom-line defensive posture for a defendant is that the patent's claims have not been subject to PTAB validity challenges, meaning they are untested in this forum.

Strategic summary

Since no PTAB proceedings have been identified for US Patent 10,615,928, all claims (claims 1-21) remain UNTESTED in the context of AIA trial proceedings. This means there is no estoppel landscape established by PTAB decisions. Any potential defendant facing assertion of this patent would have a full range of prior-art grounds available for an IPR, PGR, or CBM petition, assuming statutory requirements are met.

The absence of PTAB activity for an issued patent, particularly one published in 2020, can be a signal. For patents that are actively asserted or widely licensed, it is common to see defensive PTAB challenges. The lack of such challenges for US10615928 could imply it has not been heavily asserted, or that strong prior art grounds for challenging its validity under AIA trials have not yet been identified or pursued.

Recommended next steps

Given the confirmed absence of any PTAB proceedings for US Patent 10,615,928:

• If you are a defendant facing assertion of this patent: It is highly recommended to initiate a comprehensive prior art search targeting claims 1-21 of US Patent 10,615,928. If strong prior art (patents or printed publications) is discovered that anticipates or renders obvious the claimed invention, filing an Inter Partes Review (IPR) petition could be a potent defensive strategy. The absence of previous IPRs means there's no prior PTAB decision to overcome or learn from, offering a clean slate for a challenge.
• The statutory deadline for filing a Post-Grant Review (PGR) for US Patent 10,615,928 has passed. PGR petitions must be filed within nine months of the patent's grant or reissue date. US10615928 was granted on April 7, 2020, making it ineligible for PGR.
• There are no active trial-stage milestones (like institution decision deadlines, oral hearings, or Final Written Decision due dates) to track for this patent. The lack of PTAB activity itself is a signal: well-asserted patents often attract IPRs.