Patent US2805397A successfully refreshed from Google Patents.
US2805397A
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: 1957-09-03
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Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 Ian M Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:53
CPC Classifications
H; H10; H10D; H10D99/00; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1206; H03B5/1231
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2623102A
Cited
US2600500A
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US2672528A
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US2570978A
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US2701302A
Cited
US2623105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |