US2750928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo-assisted control systems
Assignee: British Messier Ltd
•
Filing: 1953-05-26
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Granted: 1956-06-19
•
Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
- 👤 Conway Hugh Graham
- 👤 Elmer Arthur Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:04
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/10; B; B64; B64C; B64C13/00; B64C13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675786A
Cited
US1869956A
Cited
GB424952A
Cited
US2284298A
Cited
US2591871A
Cited
US2462994A
Cited
US2623502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |