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US3422284A
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Or type fail-safe logic circuit
Assignee: Compagnie des Freins et Signaux Westinghouse SA
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Filing: 1965-01-05
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Granted: 1969-01-14
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Expires: 1985-01-05
Abstract
No abstract record available.
Inventors
- 👤 Gerard Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:44
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/04; B61L1/00; B61L1/20; B61L17/00; H; H03; H03K; H03K19/00; H03K19/003; H03K19/00307; H03K19/007; H03K19/02; H03K19/08; H03K19/082; H03K19/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3105923A
Cited
US3027465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |