US2686838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translator
Assignee: AT&T Inc
•
Filing: 1950-04-06
•
Granted: 1954-08-17
•
Expires: 1970-04-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Dehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1872558A
Cited
US2248937A
Cited
US2275039A
Cited
US2283395A
Cited
US2320081A
Cited
US2298699A
Cited
US2369474A
Cited
US2364445A
Cited
US2518022A
Cited
US2542800A
Cited
US2585904A
Cited
US2559312A
Cited
US2603716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |