US2853549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High level contrast control for video amplifiers
Assignee: RCA Corp
•
Filing: 1951-03-30
•
Granted: 1958-09-23
•
Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 Bethel E Denton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:46
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/57; H04N5/04; H04N5/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2236066A
Cited
US2234830A
Cited
CH246035A
Cited
US2448771A
Cited
US2552022A
Cited
US2656413A
Cited
US2505367A
Cited
US2540646A
Cited
US2584332A
Cited
US2718551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |