US2663806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor signal translating device
Assignee: AT&T Inc
•
Filing: 1952-05-09
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Granted: 1953-12-22
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Expires: 1972-05-09
Abstract
No abstract record available.
Inventors
- 👤 Darlington Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:56
CPC Classifications
H; H10; H10D; H10D88/00; H03; H03F; H03F3/00; H03F3/04; H03F3/14; H03F3/34; H03F3/343; H03F3/3432; H03F3/3435; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/16; H04B3/18; H10W; H10W74/00; H10W74/10; H10W74/111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2476323A
Cited
US2569347A
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US2585078A
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US2595496A
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US2595497A
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US2586080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |