Patent US3489181A successfully refreshed from Google Patents.
US3489181A
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US
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Fluid amplifier position control system
Assignee: General Electric Co
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Filing: 1964-10-23
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Granted: 1970-01-13
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Expires: 1984-10-23
Abstract
No abstract record available.
Inventors
- 👤 Willis A Boothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:04
CPC Classifications
F; F15; F15B; F15B9/00; F15C; F15C1/00; F15C1/003; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/2071; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/2153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2967537A
Cited
US3040715A
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US3131601A
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US3223103A
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US3223101A
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US3302398A
Cited
US3292648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |