Patent US2663829A successfully refreshed from Google Patents.
US2663829A
Expired / Lapsed
US
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Semiconductor translator
Assignee: AT&T Inc
•
Filing: 1948-12-29
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Granted: 1953-12-22
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Walter H Brattain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:41
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; G; G01; G01R; G01R31/00; G01R31/26; H10D10/00; H10D99/00; H10P; H10P95/00; H10W; H10W99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2577803A
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 |