Patent FR640280A successfully refreshed from Google Patents.
FR640280A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to compressors, exhaust fans and rotary engine machines
Assignee: William Reavell
•
Filing: 1927-08-30
•
Granted: 1928-07-10
•
Expires: 1947-08-30
Abstract
No abstract record available.
Inventors
- 👤 William Reavell
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-02 20:40
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/352
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.