Patent US2974188A successfully refreshed from Google Patents.
US2974188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bilateral video transmission system
Assignee: CITIZENS BANK OF MARYLAND
•
Filing: 1956-12-19
•
Granted: 1961-03-07
•
Expires: 1976-12-19
Abstract
No abstract record available.
Inventors
- 👤 Henry M Diambra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:55
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/10; H04N7/102; H04N7/104; H04N7/16; H04N7/173
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2021743A
Cited
US2308381A
Cited
US2258275A
Cited
US2666132A
Cited
US2414101A
Cited
US2455711A
Cited
US2695332A
Cited
US2776429A
Cited
US2782379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |