Company and patent pages computed from USPTO records, every date with its work shown.
What this site does
Look up a company and see how many US patents it holds and when each term ends. Look up a patent or application number directly and get its computed term end, in force or expired. Notable patents, recorded assignments, and maintenance-fee deadlines are cross-linked from the same USPTO records. The site is updated daily, within hours of USPTO publication.
How a date is computed
Every computed date carries a confidence tier and shows the rule chain that produced it, not just the result. Where the record is genuinely silent, this site says so rather than guessing. Read the full methodology.
Part of 137 Finder
The Patent Finder is published by 137 Finder LLC. Other 137 Finder sites: PolitiFinder (U.S. elections and the people who run in them), JudicialFinder (the U.S. judiciary), GravityFinder (a relational explorer of the universe), TheFiscalFinder (federal spending: the agencies, contractors, and awards behind every dollar), and MoleculeFinder (the molecules behind everything).
Contact
Questions, or a company record that looks wrong: support@thepatentfinder.com. Corrections are reviewed against the source record and are always free.