Patent US2776381A successfully refreshed from Google Patents.
US2776381A
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Multielectrode semiconductor circuit element
Assignee: AT&T Inc
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Filing: 1952-01-25
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Granted: 1957-01-01
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Expires: 1972-01-25
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/14; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2524035A
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US2476323A
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US2560579A
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US2502479A
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US2600500A
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US2655607A
Cited
US2660624A
Cited
US2609429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |