US3517679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual fluid crossover control
Assignee: RTX Corp
•
Filing: 1968-03-08
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Granted: 1970-06-30
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Expires: 1988-03-08
Abstract
No abstract record available.
Inventors
- 👤 John S Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; F; F02; F02C; F02C9/00; F02C9/26; F02C9/40; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/2496; Y10T137/2514; Y10T137/2531
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1849335A
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US2074882A
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US2072384A
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US2637334A
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US2884758A
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US3038486A
Cited
US3168810A
Cited
US3382672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |