Patent US2903251A successfully refreshed from Google Patents.
Patent CA948332A successfully refreshed from Google Patents.
CA948332A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Fire alarm with ionization chamber
Assignee: Preussag AG Feuerschutz
•
Filing: 1971-05-14
•
Granted: 1974-05-28
•
Expires: 1991-05-14
Abstract
No abstract record available.
Inventors
- 👤 Hartwig Beyersdorf
- 👤 Lothar Rims
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/11
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.