Patent US3180928A successfully refreshed from Google Patents.
US3180928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television apparatus and circuits therefor
Assignee: Zenith Electronics LLC
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Filing: 1951-06-20
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Granted: 1965-04-27
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Expires: 1971-06-20
Abstract
No abstract record available.
Inventors
- 👤 John L Rennick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:20
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/67
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A CIRCUIT FOR UTILIZING A PLURALITY OF SIGNALS COMPRISING: AT LEAST THREE ELECTRODE SYSTEMS, INDIVIDUALLY INCLUDING AN ANODE, A CATHODE AND A CONTROL ELECTRODE AND HAVING A PREDETERMINED CONTROL ELECTRODE-ANODE TRANSCONDUCTANCE; A COMMON CATHODE IMPEDANCE CONNECTING EACH OF SAID CATHODES WITH A PLANE OF FIXED REFERENCE POTENTIAL AND HAVING AN IMPEDANCE VALUE LARGE WITH RESPECT TO THE RECIPROCAL OF SAID TRANSCONDUCTANCE; AND MEANS FOR APPLYING SAID SIGNALS BETWEEN DIFFERENT ONES OF SAID CONTROL ELECTRODES AND SAID PLANE OF FIXED REFERENCE POTENTIAL.
Claim 2
Dependent Claim
81 words
A CIRCUIT FOR UTILIZING A PLURALITY OF SIGNALS COMPRISING: AT LEAST THREE ELECTRODE SYSTEMS, INDIVIDUALLY INCLUDING AN ANODE, A CATHODE AND A CONTROL ELECTRODE AND HAVING A PREDETERMINED CONTROL ELECTRODE-ANODE TRANSCONDUCTANCE; A COMMON CATHODE IMPEDANCE CONNECTING EACH OF SAID CATHODES WITH A PLANE OF FIXED REFERENCE POTENTIAL AND HAVING AN IMPEDANCE VALUE LARGE WITH RESPECT TO THE RECIPROCAL OF SAID TRANSCONDUCTANCE; AND MEANS FOR APPLYING SAID SIGNALS BETWEEN DIFFERENT ONES OF SAID CONTROL ELECTRODES AND SAID PLANE OF FIXED REFERENCE POTENTIAL.
Claim 3
Dependent Claim
116 words
MATRIXING APPARATUS FOR COLOR-TELEVISION SIGNALS COMPRISING: MEANS FOR SUPPLYING A PAIR OF SIGNALS INDIVIDUALLY REPRESENTATIVE OF UNLIKE COLOR OF AN IMAGE; A PLURALITY OF ELECTRON-DISCHARGE DEVICES EACH HAVING AT LEAST A CATHODE, AN ANODE, AND A CONTROL ELECTRODE; MEANS FOR APPLYING SAID PAIR OF SIGNALS INDIVIDUALLY TO DIFFERENT ONES OF SAID CONTROL ELECTRODES; MEANS, INCLUDING AN IMPEDANCE NETWORK CROSS COUPLING SAID CATHODES, FOR DEVELOPING FROM PREDETERMINED PROPORTIONS OF SAID APPLIED SIGNALS AT ONE OF SAID CATHODES ANOTHER SIGNAL REPRESENTATIVE OF ANOTHER COLOR; AND A PLURALITY OF OUTPUT CIRCUITS INDIVIDUALLY COUPLED TO DIFFERENT ONES OF SAID ANODES FOR DEVELOPING IN SAID OUTPUT CIRCUITS OUTPUTS SIGNALS INDIVIDUALLY REPRESENTATIVE OF DIFFERENT ONES OF THREE UNLIKE COLORS OF SAID IMAGE.
Claim 4
Dependent Claim
116 words
MATRIXING APPARATUS FOR COLOR-TELEVISION SIGNALS COMPRISING: MEANS FOR SUPPLYING A PAIR OF SIGNALS INDIVIDUALLY REPRESENTATIVE OF UNLIKE COLOR OF AN IMAGE; A PLURALITY OF ELECTRON-DISCHARGE DEVICES EACH HAVING AT LEAST A CATHODE, AN ANODE, AND A CONTROL ELECTRODE; MEANS FOR APPLYING SAID PAIR OF SIGNALS INDIVIDUALLY TO DIFFERENT ONES OF SAID CONTROL ELECTRODES; MEANS, INCLUDING AN IMPEDANCE NETWORK CROSS COUPLING SAID CATHODES, FOR DEVELOPING FROM PREDETERMINED PROPORTIONS OF SAID APPLIED SIGNALS AT ONE OF SAID CATHODES ANOTHER SIGNAL REPRESENTATIVE OF ANOTHER COLOR; AND A PLURALITY OF OUTPUT CIRCUITS INDIVIDUALLY COUPLED TO DIFFERENT ONES OF SAID ANODES FOR DEVELOPING IN SAID OUTPUT CIRCUITS OUTPUTS SIGNALS INDIVIDUALLY REPRESENTATIVE OF DIFFERENT ONES OF THREE UNLIKE COLORS OF SAID IMAGE.
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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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |