US2871286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Message transmission system
Assignee: AT&T Inc
•
Filing: 1953-11-18
•
Granted: 1959-01-27
•
Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 Walter M Bacon
- 👤 David E Branson
- 👤 George J Knandel
- 👤 George A Locke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2444078A
Cited
US2456533A
Cited
US2574774A
Cited
US2666095A
Cited
US2667533A
Cited
US2805283A
Cited
US2752414A
Cited
US2703338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |