US2512700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple variable-speed drive
Assignee: Unisys Corp
•
Filing: 1946-03-29
•
Granted: 1950-06-27
•
Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 Howard C Van Auken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:35
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/22; F41G3/24; F16; F16H; F16H15/00; F16H15/02; F16H15/04; F16H15/40; G; G06; G06G; G06G3/00; G06G3/08; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1187440A
Cited
US1448490A
Cited
US1831595A
Cited
DE630318C
Cited
US2377898A
Cited
US2357035A
Cited
US2359132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |