US2748349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of junction transistors
Assignee: AT&T Inc
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Filing: 1955-02-04
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Granted: 1956-05-29
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Expires: 1975-02-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Emil Dickten
- 👤 Richard P Riesz
- 👤 Jr Robert L Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:34
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0438; C; C10; C10K; C10K1/00; C10K1/08; G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2637; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |