Patent 027852

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.

Cases on file (0)

Specific litigation cases in our database that name US patent 027852. The free-form analysis below may also discuss cases beyond this list.

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Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

Litigation Search for US Patent 027852

As of April 29, 2026, a comprehensive search of patent litigation databases and federal court dockets reveals no known litigation involving a U.S. Patent with the number 027852.

This result aligns with the "Patent Summary" section generated on April 28, 2026, which concluded that U.S. Patent 027852 does not conform to the numbering conventions for a U.S. utility or design patent. For a patent to be the subject of litigation, it must first be a validly issued patent.

Searches were conducted using the literal identifier "027852" in publicly accessible litigation resources, including the Public Access to Court Electronic Records (PACER) system, the U.S. Court of Appeals for the Federal Circuit (CAFC) dockets, and third-party patent litigation databases. These searches yielded no responsive results for a patent with this number.

While the number "027852" appears in other contexts within patent-related documents, these are not instances of a U.S. patent with this number being litigated:

  • An application number US07/027,852, filed in 1987, corresponds to the now-expired U.S. Patent 4,826,810.
  • A provisional application, 63/027,852, is cited as a priority document for a different patent application.
  • A Canadian patent application has the number 2017/027852.

These are distinct identifiers and do not refer to an issued U.S. Patent 027852. Therefore, no litigation history can be provided because the subject patent does not appear to exist.

Generated 4/29/2026, 6:21:50 PM