US3144568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay circuit
Assignee: Westinghouse Electric Corp
•
Filing: 1961-02-15
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Granted: 1964-08-11
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 Sheldon D Silliman
- 👤 David L Griscom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:42
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H01; H01H; H01H47/00; H01H47/02; H01H47/18; H03K17/292
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |