Patent FR888273A successfully refreshed from Google Patents.
FR888273A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to respirators and underwater exploration masks
Assignee: Leon Vitrant
•
Filing: 1942-02-23
•
Granted: 1943-12-08
•
Expires: 1962-02-23
Abstract
No abstract record available.
Inventors
- 👤 Leon Vitrant
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-02 22:08
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/20; B63C11/205; A; A62; A62B; A62B7/00
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.