Patent US2855524A successfully refreshed from Google Patents.
US2855524A
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US
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Semiconductive switch
Assignee: AT&T Inc
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Filing: 1955-11-22
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Granted: 1958-10-07
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Expires: 1975-11-22
Abstract
No abstract record available.
Inventors
- 👤 Shockley William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:12
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/70; H10; H10D; H10D8/00; H10D8/80; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/26; H10F30/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2588254A
Cited
US2655610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |