US2471422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position and speed control system
Assignee: Unisys Corp
•
Filing: 1943-07-09
•
Granted: 1949-05-31
•
Expires: 1963-07-09
Abstract
No abstract record available.
Inventors
- 👤 William F Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:14
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2068490A
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US2287002A
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US2131759A
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US2209369A
Cited
US2263497A
Cited
US2325092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |