US2687706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential hydraulic servomotor
Assignee: Sperry Gyroscope Co Ltd
•
Filing: 1950-04-11
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Granted: 1954-08-31
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Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Glenny Arthur Philip
- 👤 Spencer Dennis Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:45
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30565; F15B2211/315; F15B2211/32; F15B2211/321; F15B2211/322; F15B2211/324; F15B2211/80; F15B2211/895
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |