Patent US3534228A successfully refreshed from Google Patents.
US3534228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator and exciter protection circuit
Assignee: Westinghouse Electric Corp
•
Filing: 1968-05-08
•
Granted: 1970-10-13
•
Expires: 1988-05-08
Abstract
No abstract record available.
Inventors
- 👤 Wayne E Hyvarinen
- 👤 John C Olliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:52
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/36; H02K19/365; H02H; H02H7/00; H02H7/06; H02H7/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3210603A
Cited
US3351845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |