Patent US2503837A successfully refreshed from Google Patents.
US2503837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical translating device
Assignee: AT&T Inc
•
Filing: 1945-07-27
•
Granted: 1950-04-11
•
Expires: 1965-07-27
Abstract
No abstract record available.
Inventors
- 👤 Russell S Ohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
H; H10; H10D; H10D99/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB233782A
Cited
US1872304A
Cited
US2089830A
Cited
US1905525A
Cited
US1908800A
Cited
US2402839A
Cited
US2419561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |