US3539897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo control system including means to compare programmed velocity with actual velocity to eliminate velocity error
Assignee: Cleveland Machine Controls Inc
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Filing: 1968-07-22
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Granted: 1970-11-10
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Expires: 1988-07-22
Abstract
No abstract record available.
Inventors
- 👤 Marcel R Sommeria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/35; G05B19/351; G05B19/353; G05B2219/00; G05B2219/30; G05B2219/42; G05B2219/42072
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |