Patent US4425434A successfully refreshed from Google Patents.
US2976010A
Expired / Lapsed
US
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Valve structure
Assignee: General Fire Extinguisher Corp
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Filing: 1958-04-11
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Granted: 1961-03-21
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Expires: 1978-04-11
Abstract
No abstract record available.
Inventors
- 👤 Sr Charles K Huthsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:13
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/003; F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US881060A
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US2091874A
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US2256891A
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US2322949A
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FR889553A
Cited
US2447510A
Cited
US2717112A
Cited
US2821356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |