US2913652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed regulating servo system
Assignee: Unisys Corp
•
Filing: 1956-12-31
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Granted: 1959-11-17
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 David R Greenberg
- 👤 David H Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:51
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/26; H02P7/265; G; G11; G11B; G11B19/00; G11B19/20; G11B19/28; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/921; Y10S388/923; Y10S388/93
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |