US2755459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Code translator
Assignee: AT&T Inc
•
Filing: 1952-03-29
•
Granted: 1956-07-17
•
Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carbrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:32
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/14; H03M7/16; H03M5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2568319A
Cited
US2490039A
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US2570236A
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US2473457A
Cited
US2607007A
Cited
US2530957A
Cited
US2700696A
Cited
US2679644A
Cited
US2236134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |