Patent US2601231A successfully refreshed from Google Patents.
US2601231A
Expired / Lapsed
US
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Quick-acting diaphragm operated gate valve
Assignee: Equipment Dev Co Inc
•
Filing: 1948-02-13
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Granted: 1952-06-24
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Expires: 1968-02-13
Abstract
No abstract record available.
Inventors
- 👤 Edmund G Smith
- 👤 Otell M Cocchiarella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:35
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0209; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US607265A
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US1307609A
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US1016573A
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US1488296A
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US1567537A
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US1727677A
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US1953130A
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US2246092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |