US2693558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric follow-up motor control apparatus
Assignee: Ward Leonard Electric Co
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Filing: 1951-04-03
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Granted: 1954-11-02
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Expires: 1971-04-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Bastian
- 👤 Alexander F Rapisarda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:14
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1472; H; H05; H05B; H05B47/00; H05B47/10; H05B47/155
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) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |