About PatentLapse
PatentLapse monitors US patent maintenance fee deadlines and alerts you — specifically
for competitor patents. Know 6 months in advance when a blocking patent is about to lapse.
Data sources
- 📋 USPTO PTMNFEE2 — Patent Maintenance Fee Events bulk dataset (data.uspto.gov), public domain
- 📋 USPTO Patent Assignments — Assignee name by patent number, daily update
- 🔄 Update cadence — Weekly bulk data processing
What we track
- ⏰ 3.5-year fee window — 3 to 4.5 years after grant
- ⏰ 7.5-year fee window — 7 to 8.5 years after grant
- ⏰ 11.5-year fee window — 11 to 12.5 years after grant
- 🔴 Lapsed patents — Expired for non-payment, now public domain
Contact
patents@regulation.group
PatentLapse is an independent monitoring service. Not affiliated with USPTO.
All data sourced from USPTO public domain bulk datasets.