US2483678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic speed control of motors
Assignee: ABE BLUMENFELD
•
Filing: 1946-04-06
•
Granted: 1949-10-04
•
Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 George W Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/18; H05B31/22; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1662434A
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US1942587A
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US1944756A
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US2028572A
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US2145010A
Cited
US2175009A
Cited
US2265687A
Cited
US2391086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |