US2687451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single channel telegraph transmitting distributor
Assignee: AT&T Teletype Corp
•
Filing: 1953-04-15
•
Granted: 1954-08-24
•
Expires: 1973-04-15
Abstract
No abstract record available.
Inventors
- 👤 Ransom D Slayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:06
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/22; H04L5/24; H04L5/245; A; A24; A24D; A24D1/00; A24D1/16; H04L13/00; H04L13/02; H04L13/10; H04L13/12; H04L13/14; H04L25/00; H04L25/38; H04L25/40; H04L25/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2117804A
Cited
US2159107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |