Patent US2916677A successfully refreshed from Google Patents.
US2916677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armature hold-down latch for electrical relays
Assignee: Westinghouse Air Brake Co
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Filing: 1957-02-21
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Granted: 1959-12-08
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Expires: 1977-02-21
Abstract
No abstract record available.
Inventors
- 👤 Richard C Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:28
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2236; H01H50/00; H01H50/16; H01H50/18; H01H50/32; H01H50/321; H01H50/36; H01H50/40
Claims Analysis
Total Claims: 0
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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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |