US2145545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled variable-speed device
Assignee: STERLING ELECTRIC MOTORS Inc
•
Filing: 1936-06-01
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Granted: 1939-01-31
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Expires: 1956-06-01
Abstract
No abstract record available.
Inventors
- 👤 Carl E Johnson
- 👤 Mendenhall Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:28
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; F16H57/0415; F16H57/048; F16H57/0487; F16H57/0489; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H9/16; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186
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) | 1942-01-30 | 1942-08-01 | 1943-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-30 | 1946-08-01 | 1947-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-30 | 1950-08-01 | 1951-01-31 | $7700.00 | Window Closed / Lapsed |