Patent US2637343A successfully refreshed from Google Patents.
US2637343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas valve and electromagnetic control therefor
Assignee: Milwaukee Gas Specialty Co
•
Filing: 1949-10-17
•
Granted: 1953-05-05
•
Expires: 1969-10-17
Abstract
No abstract record available.
Inventors
- 👤 Russell B Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:00
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/105
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US363186A
Cited
US2294693A
Cited
US1066081A
Cited
US1531007A
Cited
US1672193A
Cited
US1980736A
Cited
US1986158A
Cited
US2125910A
Cited
US2222141A
Cited
US2232502A
Cited
US2263819A
Cited
US2292477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |