US3460020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-controlled voltage regulator
Assignee: Cooper Industries LLC
•
Filing: 1967-08-11
•
Granted: 1969-08-05
•
Expires: 1987-08-11
Abstract
No abstract record available.
Inventors
- 👤 Halsey P Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:50
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5387; H02M7/53871; H02M7/53878
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3189813A
Cited
US3317812A
Cited
US3247447A
Cited
US3309600A
Cited
US3346798A
Cited
US3311807A
Cited
US3378751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |