Patent US2297854A successfully refreshed from Google Patents.
US2297854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined thermoelectric safety shut-off and electroresponsive valve
Assignee: Milwaukee Gas Specialty Co
•
Filing: 1929-11-09
•
Granted: 1942-10-06
•
Expires: 1949-11-09
Abstract
No abstract record available.
Inventors
- 👤 Henry F Alfery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:34
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/025; F16K17/00; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/105; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/20; G05D23/22; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516
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
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-10-05 | 1946-04-06 | 1946-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-05 | 1950-04-06 | 1950-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-05 | 1954-04-06 | 1954-10-06 | $7700.00 | Window Closed / Lapsed |