Patent US3460092A successfully refreshed from Google Patents.
US3460092A
Expired / Lapsed
US
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Selector matrix check circuit
Assignee: AT&T Inc
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Filing: 1965-03-31
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Granted: 1969-08-05
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Evan E Davidson
- 👤 William M Regitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:28
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6221; G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/085; H03K17/64
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) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |