US2970788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windup drive system utilizing induction motors
Assignee: US Electrical Motors Inc
•
Filing: 1957-12-02
•
Granted: 1961-02-07
•
Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 William R Warncke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:58
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/1806; B65H18/00; B65H18/08; B65H18/10; B65H18/103; B65H23/195; B65H23/198
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1951875A
Cited
US2214355A
Cited
US2281569A
Cited
US2353408A
Cited
US2569287A
Cited
US2728018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |