Patent US2645451A successfully refreshed from Google Patents.
US2645451A
Expired / Lapsed
US
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Valve structure
Assignee: Individual
•
Filing: 1947-08-11
•
Granted: 1953-07-14
•
Expires: 1967-08-11
Abstract
No abstract record available.
Inventors
- 👤 John N Gladden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:40
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86686; Y10T137/86879; Y10T137/86895
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US717292A
Cited
US1567711A
Cited
US1602118A
Cited
US1718530A
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US1720197A
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US1937246A
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US1972821A
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US2071890A
Cited
US2071391A
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US2089279A
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US2417494A
Cited
US2397117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |