US3069558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency sensitive control circuit
Assignee: Westinghouse Electric Corp
•
Filing: 1957-08-12
•
Granted: 1962-12-18
•
Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Donald A Burt
- 👤 Jr Clyde A Booker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:25
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2686877A
Cited
US2739273A
Cited
US2699499A
Cited
US2712600A
Cited
US2773181A
Cited
US2834879A
Cited
US2781478A
Cited
US2817755A
Cited
US2756336A
Cited
US2839684A
Cited
US2780724A
Cited
US2849626A
Cited
US2892102A
Cited
US2898557A
Cited
US2879456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |