US1851072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for electrical transmission of pictures
Assignee: AT&T Inc
•
Filing: 1923-12-15
•
Granted: 1932-03-29
•
Expires: 1943-12-15
Abstract
No abstract record available.
Inventors
- 👤 Gilbert S Vernam
- 👤 Edward F Watson
- 👤 Donald B Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/90; H04N19/93
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-03-29 | 1935-09-28 | 1936-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-29 | 1939-09-28 | 1940-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-29 | 1943-09-28 | 1944-03-29 | $7700.00 | Window Closed / Lapsed |