US2597259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of control amplifiers
Assignee: Askania Regulator Co
•
Filing: 1949-10-13
•
Granted: 1952-05-20
•
Expires: 1969-10-13
Abstract
No abstract record available.
Inventors
- 👤 Wilbur F Pray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
G; G05; G05D; G05D13/00; G05B; G05B5/00; G05B5/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1594959A
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US1887335A
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US1958503A
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US1962676A
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US2051837A
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US2312464A
Cited
US2258278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |