US3104281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for effecting the automatic contrast control in television receivers
Assignee: International Standard Electric Corp
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Filing: 1960-09-30
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Granted: 1963-09-17
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Expires: 1980-09-30
Abstract
No abstract record available.
Inventors
- 👤 Wolff Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/50; G; G08; G08C; G08C17/00; G08C17/02; H03; H03D; H03D13/00; H03D13/007; H03D13/009; H03J; H03J3/00; H03J7/00; H03J7/02; H03J7/04; H04N5/04; H04N5/12; H04N5/126; H04N5/14; H04N5/20; H04N5/57; H04N5/58; H04N9/00; H04N9/44; H04N9/455
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
AN AUTOMATIC CONTRAST CONTROL FOR TELEVISION RECEIVERS COMPRISING: A SOURCE OF VIDEO SIGNAL; A RECTIFIER MEANS COUPLED TO THE OUTPUT OF SAID SOURCE TO PRODUCE A CONTROL VOLTAGE PROPORTIONAL TO THE WHITE-LEVEL VALUE OF SAID VIDEO SIGNAL; AND MEANS COUPLED TO THE OUTPUT OF SAID SOURCE RESPONSIVE TO SAID CONTROL VOLTAGE TO CONTROL THE CONTRAST OF SAID VIDEO SIGNAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |