US2778956A
Expired / Lapsed
US
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Semiconductor signal translating devices
Assignee: AT&T Inc
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Filing: 1952-10-31
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Granted: 1957-01-22
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Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 George C Dacey
- 👤 Ian M Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:27
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/567; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1203; H03B5/1231; H03F; H03F3/00; H03F3/04; H03F3/14; H03F3/16; H03F3/165; H03K3/00; H03K3/02; H03K3/35; H03K3/353; H10; H10D; H10D99/00
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |