US2974681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid distributor valves
Assignee: Individual
•
Filing: 1957-07-15
•
Granted: 1961-03-14
•
Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Whitehurst George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/46; F02M69/50; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F02M2700/00; F02M2700/05; F02M2700/055; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86493; Y10T137/86501
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141472A
Cited
US2415888A
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US2477590A
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US2633325A
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US2666677A
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US2631811A
Cited
US2696219A
Cited
US2691814A
Cited
US2776104A
Cited
US2715617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |