About PatentCliff
Which patents are about to expire?
What we do
PatentCliff tracks expiring U.S. patents so investors, generics manufacturers, and researchers can see the cliff coming.
We focus on U.S. patent filings, expirations, and patent cliffs. Every page on patentcliff.org is built from the USPTO PatentsView API, cited and linkable so readers can trace any number back to its source.
Who this is for
PatentCliff is built for pharma investors, generics teams, R&D strategists, and patent attorneys.
Why this exists
Public data on U.S. patent filings, expirations, and patent cliffs is technically free, but practically locked behind file formats, acronyms, and paywalled dashboards. PatentCliffexists to close that gap: take the raw federal and public-sector data, and turn it into pages a normal person can read in thirty seconds.
How we work
- Primary source only. We pull from the USPTO PatentsView API and cite the exact dataset and version on every page.
- No invented numbers. If a figure is not in the underlying public data, it does not appear on patentcliff.org. We never generate synthetic statistics to fill gaps.
- Refreshed on a schedule. Data is refetched on a published cadence — you can see the "Last updated" date on every dataset page.
- Corrections welcome. Readers flag issues all the time. When the source fixes a record, PatentCliff follows.
Independence
PatentCliff is an independent publication. We are not funded, owned, or directed by any of the agencies, companies, or organizations that appear in our data. Hosting is paid for by advertising — see our Privacy Policy for details — and we do not take paid placements, sponsored rankings, or "remove-my-entry" fees.
History
PatentCliff launched in 2026 as part of a small portfolio of independent public-data sites. It has been maintained and updated continuously since.
Contact
Tips, corrections, data-partnership questions, and press inquiries: [email protected]. More options on our contact page.