Patent US2773706A successfully refreshed from Google Patents.
US2773706A
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US
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Valved coupling
Assignee: E B WIGGINS OIL TOOL CO Inc
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Filing: 1952-10-10
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Granted: 1956-12-11
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Expires: 1972-10-10
Abstract
No abstract record available.
Inventors
- 👤 Ira A Leavell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:31
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/30; F16L37/36; F16L37/08; F16L37/12; F16L37/127; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87096; Y10T137/87105; Y10T137/87917; Y10T137/87925; Y10T137/87973
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048936A
Cited
US2425500A
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US2444414A
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US2625410A
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US2678834A
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US2637572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |