Patent DE2628443A1 successfully refreshed from Google Patents.
US2451045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic message numbering telegraph transmitter
Assignee: AT&T Teletype Corp
•
Filing: 1943-12-20
•
Granted: 1948-10-12
•
Expires: 1963-12-20
Abstract
No abstract record available.
Inventors
- 👤 Louis M Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:02
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1870352A
Cited
US2193967A
Cited
US2116506A
Cited
US2129741A
Cited
US2106805A
Cited
US2193809A
Cited
US2154547A
Cited
US2172920A
Cited
US2297789A
Cited
US2336373A
Cited
US2304775A
Cited
US2318168A
Cited
US2344792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |