US2917672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loss-of-field relays
Assignee: Westinghouse Electric Corp
•
Filing: 1953-08-11
•
Granted: 1959-12-15
•
Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Richard L Tremaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:06
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/0805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2425759A
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US2425735A
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US2525485A
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US2509025A
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US2523771A
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US2584765A
Cited
US2728071A
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US2655646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |