Patent US2415909A successfully refreshed from Google Patents.
US2415909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing telegraph apparatus
Assignee: AT&T Teletype Corp
•
Filing: 1941-05-22
•
Granted: 1947-02-18
•
Expires: 1961-05-22
Abstract
No abstract record available.
Inventors
- 👤 Louis M Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:07
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/16; H04L17/24; H04L13/00; H04L13/18; H04L13/186; H04L13/188
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1811132A
Cited
US1821124A
Cited
US1844686A
Cited
US1972466A
Cited
US2192353A
Cited
US2257828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |