Patent US2702838A successfully refreshed from Google Patents.
US2702838A
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US
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Semiconductor signal translating device
Assignee: AT&T Inc
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Filing: 1951-11-15
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Granted: 1955-02-22
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Expires: 1971-11-15
Abstract
No abstract record available.
Inventors
- 👤 James R Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:41
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H10; H10D; H10D99/00; H10F; H10F99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US655607A
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US2524035A
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US2476323A
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US2600500A
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US2553490A
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US2624016A
Cited
US2560606A
Cited
US2570978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |