US2687738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined control and safety shutoff valve
Assignee: Milwaukee Gas Specialty Co
•
Filing: 1950-04-11
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Granted: 1954-08-31
•
Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 John H Thornbery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:41
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/06; F23N5/065; F23N1/00; F23N1/005; F23N5/10; F23K; F23K2900/00; F23K2900/05001; F23N2235/00; F23N2235/12; F23N2235/14; F23N2235/16; F23N2235/18; F23N2235/20; F23N2235/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2292477A
Cited
US2305915A
Cited
US2379712A
Cited
US2383401A
Cited
US2526972A
Cited
US2512173A
Cited
US2578194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |