FR716977A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Method and device for ventilating premises
Assignee: Sulzer AG
•
Filing: 1931-05-12
•
Granted: 1931-12-30
•
Expires: 1951-05-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-26 15:16
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/062
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.