US3538404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque regulating pulse mode d.c. motor control using the motor in the regenerating or motoring modes
Assignee: Cutler Hammer Inc
•
Filing: 1967-10-26
•
Granted: 1970-11-03
•
Expires: 1987-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Risberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/182; B65H23/1825; B65H16/00; B65H16/10; B65H23/06; B65H23/066; B65H23/195; B65H23/1955; B65H23/198; H; H02; H02P; H02P3/00; H02P3/06; H02P3/08; H02P3/14; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |