US2855554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D. c. motor speed regulator control circuit
Assignee: Louis Allis Co
•
Filing: 1957-02-15
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Granted: 1958-10-07
•
Expires: 1977-02-15
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Conger
- 👤 Hansen Hans Richard Ansgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/34; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |