FR657569A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Exhaust improvements
Assignee: Jean-Eugene-Alexandr Francois
•
Filing: 1927-11-28
•
Granted: 1929-05-24
•
Expires: 1947-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jean-Eugene-Alexandr Francois
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 17:02
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/082
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.