PTAB challenges

Proceedings overview

The USPTO Open Data Portal API returns no AIA trial proceedings for U.S. Patent 5,978,773 as of the most recent ingest. This indicates a defendant facing assertion of this patent will not find any PTAB Final Written Decisions to leverage for invalidation or estoppel purposes, meaning the patent claims remain untested at the PTAB.

Strategic summary

As there are no PTAB proceedings on file for U.S. Patent 5,978,773, all claims of the patent (claims 1-41) are considered UNTESTED by the PTAB. This means there are no claims that have been formally invalidated or sustained through an Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) review.

Consequently, there is no estoppel landscape established under 35 U.S.C. § 315(e)(2) for this patent. All potential prior-art grounds are still available for a defendant to assert, either in litigation or in a newly filed PTAB petition. The absence of PTAB activity suggests that, despite the patent's expiration in 2015 and its prior litigation history, no party successfully brought an AIA trial challenge against it, or at least, none were formally instituted or reached a public decision.

Recommended next steps

Since no PTAB activity exists for U.S. Patent 5,978,773, a defendant facing assertion of this patent today should be aware that all claims are untested at the PTAB. The absence of PTAB activity suggests either that previous potential petitioners chose not to file, or that any petitions filed were not instituted or were privately settled before reaching a public decision. This means that a defendant would need to undertake a comprehensive prior art search and analysis to determine the patent's validity, without the benefit of a PTAB validity determination. The patent expired on October 3, 2015, which means it cannot be asserted for new infringement, but could still be asserted for past infringement occurring before the expiration date.