US2870254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph system
Assignee: AT&T Teletype Corp
•
Filing: 1955-06-28
•
Granted: 1959-01-20
•
Expires: 1975-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ransom D Slayton
- 👤 Raymond R Simessaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:13
CPC Classifications
H; H04; H04L; H04L43/00; H04L43/50; H04L1/00; H04L1/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121163A
Cited
US2193811A
Cited
US2354534A
Cited
US2353055A
Cited
US2351014A
Cited
US2439398A
Cited
US2465507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |