US2728905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line feed failure indicator
Assignee: AT&T Teletype Corp
•
Filing: 1951-11-10
•
Granted: 1955-12-27
•
Expires: 1971-11-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Eklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:50
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2165302A
Cited
US2351014A
Cited
US2512038A
Cited
US2546819A
Cited
US2547525A
Cited
US2628346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |