US2855900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure servo system with valve actuating means having a differential feel
Assignee: British Messier Ltd
•
Filing: 1955-10-25
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Granted: 1958-10-14
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Expires: 1975-10-25
Abstract
No abstract record available.
Inventors
- 👤 Elmer Arthur Ernest Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:39
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE314523C
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US2219967A
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US2341502A
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US2380705A
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US2487116A
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US2596242A
Cited
US2719511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |