FR647174A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Air filter
Assignee: Jules-Louis-Eugene Roubaud
•
Filing: 1927-06-03
•
Granted: 1928-11-21
•
Expires: 1947-06-03
Abstract
No abstract record available.
Inventors
- 👤 Jules-Louis-Eugene Roubaud
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10
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.