US2757297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay devices
Assignee: Westinghouse Electric Corp
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Filing: 1955-06-07
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Granted: 1956-07-31
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Expires: 1975-06-07
Abstract
No abstract record available.
Inventors
- 👤 William G Evans
- 👤 Robert A Ramey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:13
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45
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) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |