Patent FR802576A successfully refreshed from Google Patents.
FR802576A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Device for gas masks to facilitate sound transmission
Assignee: James-Francois-Emile Basset
•
Filing: 1935-05-22
•
Granted: 1936-09-08
•
Expires: 1955-05-22
Abstract
No abstract record available.
Inventors
- 👤 James-Francois-Emile Basset
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 09:00
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08
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.