Patent US3526778A successfully refreshed from Google Patents.
US3526778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
No-break power system
Assignee: Power Systems and Controls Inc
•
Filing: 1967-08-04
•
Granted: 1970-09-01
•
Expires: 1987-08-04
Abstract
No abstract record available.
Inventors
- 👤 Leon B Crocker
- 👤 Robert Carter
- 👤 Ralph A Amos
- 👤 E John Le Proux
- 👤 Charles A Gregory Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:10
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/066
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2783393A
Cited
US2920211A
Cited
US2972056A
Cited
US3050635A
Cited
US3142793A
Cited
US3345517A
Cited
US3384804A
Cited
US3418550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |