US2697187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction type alternating-current relay
Assignee: Westinghouse Electric Corp
•
Filing: 1951-10-13
•
Granted: 1954-12-14
•
Expires: 1971-10-13
Abstract
No abstract record available.
Inventors
- 👤 William K Sonnemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:11
CPC Classifications
H; H01; H01H; H01H53/00; H01H53/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE174218C
Cited
US1354142A
Cited
FR550795A
Cited
GB337119A
Cited
US2110313A
Cited
US2282986A
Cited
US2419396A
Cited
US2488443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |