US3436646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load tap changer systems including protective apparatus for monitoring the operation of the transfer switches
Assignee: Westinghouse Electric Corp
•
Filing: 1966-08-02
•
Granted: 1969-04-01
•
Expires: 1986-08-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Prescott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:46
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/02; H01F29/04; H02; H02H; H02H7/00; H02H7/04; H02H7/055
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |