US2524034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-electrode circuit element utilizing semiconductor materials
Assignee: AT&T Inc
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Filing: 1948-02-26
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Granted: 1950-10-03
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Expires: 1968-02-26
Abstract
No abstract record available.
Inventors
- 👤 Walter H Brattain
- 👤 Robert B Gibney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:21
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183; H03F3/04; H03F3/16; H03F3/165; H10; H10D; H10D99/00; H10W; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |