US2813236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for electric servomotors
Assignee: Unisys Corp
•
Filing: 1949-01-14
•
Granted: 1957-11-12
•
Expires: 1969-01-14
Abstract
No abstract record available.
Inventors
- 👤 Westfelt Gerard P De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:19
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1847934A
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US2115086A
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US2081780A
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US2256875A
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US2443639A
Cited
US2519118A
Cited
US2504155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |