US2597136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic motor control
Assignee: Westinghouse Electric Corp
•
Filing: 1947-02-21
•
Granted: 1952-05-20
•
Expires: 1967-02-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:03
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/06; B65H23/08; B65H23/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US807721A
Cited
US1954884A
Cited
US2102911A
Cited
US2116586A
Cited
US2202172A
Cited
US2437301A
Cited
US2450470A
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 |