Patent US6344054B1 successfully refreshed from Google Patents.
US2448564A
Expired / Lapsed
US
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Motor control circuits
Assignee: Unisys Corp
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Filing: 1942-07-24
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Granted: 1948-09-07
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Expires: 1962-07-24
Abstract
No abstract record available.
Inventors
- 👤 Jefferson R Wilkerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:45
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2352103A
Cited
US1998938A
Cited
US2040014A
Cited
US2088654A
Cited
US2251973A
Cited
US2324797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |