US2883561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective system for alternating current generators
Assignee: Westinghouse Electric Corp
•
Filing: 1958-04-03
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Granted: 1959-04-21
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 James R Reeder
- 👤 Ronald E Hulsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/06; H02H7/062; H02H7/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |