US2586080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive signal translating device
Assignee: AT&T Inc
•
Filing: 1949-10-11
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Granted: 1952-02-19
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Expires: 1969-10-11
Abstract
No abstract record available.
Inventors
- 👤 William G Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:22
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521; H03; H03F; H03F3/00; H03F3/04; H03F3/14; H10; H10D; H10D99/00; H10F; H10F99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2502479A
Cited
US2502488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |