US3353424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed controllers
Assignee: Singer Co
•
Filing: 1965-09-27
•
Granted: 1967-11-21
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Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Wesley R Peterson
- 👤 Albert N Cook
- 👤 Ronald R Thompson
- 👤 Alan H Stolpen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:24
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/14; D; D05; D05B; D05B69/00; D05B69/14; D05B69/18; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |