Patent US2602467A successfully refreshed from Google Patents.
US2602467A
Expired / Lapsed
US
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Power-operated check valve
Assignee: Clayton Manufacturing Co
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Filing: 1945-05-21
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Granted: 1952-07-08
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Expires: 1965-05-21
Abstract
No abstract record available.
Inventors
- 👤 Donald G Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:13
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/06; E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/108; F16K15/00; F16K15/02; F16K15/06; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/776; Y10T137/7781; Y10T137/7832; Y10T137/7835; Y10T137/7836; Y10T137/7837; Y10T137/7897; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US615881A
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US645208A
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US703757A
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FR430241A
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US1188061A
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US1236216A
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US1369444A
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FR730977A
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US1944485A
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US2233395A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |