FR643015A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements made to air filters, in particular those for explosion engines
Assignee: Joseph Borel
•
Filing: 1927-10-26
•
Granted: 1928-09-08
•
Expires: 1947-10-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph Borel
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 21:53
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/08
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.