US2623962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control for motors
Assignee: Knapp Monarch Co
•
Filing: 1949-08-13
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Granted: 1952-12-30
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Expires: 1969-08-13
Abstract
No abstract record available.
Inventors
- 👤 Alvin W Holstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/20; H02K11/21; H02K11/23; Y; Y10; Y10S; Y10S366/00; Y10S366/601; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1795240A
Cited
US2493897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |