US3117283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iso-echo contour device with circuitry to effect threshold clipping and pulse shaping
Assignee: Individual
•
Filing: 1960-08-12
•
Granted: 1964-01-07
•
Expires: 1980-08-12
Abstract
No abstract record available.
Inventors
- 👤 William L Freseman
- 👤 Jr Frank H Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:41
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/95; Y; Y02; Y02A; Y02A90/00; Y02A90/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN ISO-ECHO CONTOUR CIRCUIT COMPRISING AN INPUT FOR RECEIVING VIDEO SIGNALS, MEANS FOR ALTERING THE POLARITY OF SAID SIGNAL CONNECTED TO SAID INPUT, FIRST AND SECOND SIGNAL PATHS CONNECTED TO THE POLARITY ALTERING MEANS, A DELAY MEANS IN THE FIRST PATH, A MODULATOR-ADDER HAVING A CATHODE FOLLOWING THE DELAY MEANS, A MODULATOR CONNECTED TO THE CATHODE OF THE MODULATOR-ADDER, A CLIPPER SELECTOR IN SAID SECOND PATH, A SQUARING AMPLIFIER FOLLOWING THE CLIPPER SELECTOR, AND MEANS FOR CONNECTING THE OUTPUT OF THE SQUARING AMPLIFIER TO THE JUNCTION OF THE MODULATOR-ADDER AND THE MODULATOR, WHEREBY SIGNAL INVERSION OCCURS IN THE FIRST SIGNAL PATH.
Claim 2
Dependent Claim
101 words
AN ISO-ECHO CONTOUR CIRCUIT COMPRISING AN INPUT FOR RECEIVING VIDEO SIGNALS, MEANS FOR ALTERING THE POLARITY OF SAID SIGNAL CONNECTED TO SAID INPUT, FIRST AND SECOND SIGNAL PATHS CONNECTED TO THE POLARITY ALTERING MEANS, A DELAY MEANS IN THE FIRST PATH, A MODULATOR-ADDER HAVING A CATHODE FOLLOWING THE DELAY MEANS, A MODULATOR CONNECTED TO THE CATHODE OF THE MODULATOR-ADDER, A CLIPPER SELECTOR IN SAID SECOND PATH, A SQUARING AMPLIFIER FOLLOWING THE CLIPPER SELECTOR, AND MEANS FOR CONNECTING THE OUTPUT OF THE SQUARING AMPLIFIER TO THE JUNCTION OF THE MODULATOR-ADDER AND THE MODULATOR, WHEREBY SIGNAL INVERSION OCCURS IN THE FIRST SIGNAL PATH.
References Cited (Backward Citations)
US2426189A
Cited
US2489297A
Cited
US2490025A
Cited
US2822538A
Cited
US2605463A
Cited
US2656531A
Cited
US2786993A
Cited
US2906871A
Cited
US2908812A
Cited
US2861185A
Cited
US2977585A
Cited
US3024457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |