Patent US3131257A successfully refreshed from Google Patents.
US3131257A
Expired / Lapsed
US
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Signal processing means
Assignee: Ampex Corp
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Filing: 1961-02-09
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Granted: 1964-04-28
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Expires: 1981-02-09
Abstract
No abstract record available.
Inventors
- 👤 Kurt F Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:16
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/80; H04N5/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SYSTEM FOR REPRODUCING SIGNAL INFORMATION RECORDED IN THE FORM OF A PHYSICAL IMAGE ON A TRANSPARENT THERMOPLASTIC FILM COMPRISING: MEANS FOR APPLYING LIGHT RADIATION TO SAID FILM; OPTICAL MEANS FOR LIMITING THE RADIATION THAT IS RECEIVED AT THE OUTPUT OF SAID FILM SO THAT ONLY SUCH RADIATION WHICH IS MODULATED BY SAID RECORDED IMAGE IS EFFECTIVELY TRANSMITTED FROM SAID THERMOPLASTIC FILM; AN IMAGE CAMERA TUBE HAVING A PHOTOCONDUCTIVE TARGET FOR SCANNING SAID TRANSMITED MODULATED RADIATION, SAID PHOTOCONDUCTIVE TARGET HAVING A LOW ELECTRICAL CAPACITANCE SO THAT VERY HIGH FREQUENCY SIGNAL INFORMATION MAY BE PROCESSED; AND A UTILIZATION CIRCUIT COUPLED TO THE OUTPUT OF SAID IMAGE CAMERA TUBE INCLUDING AN ELECTRONIC NETWORK TO COMPENSATE FOR THE PHOTOCONDUCTIVE LAG OF THE TARGET.
Claim 2
Independent Claim
120 words
A SYSTEM FOR REPRODUCING SIGNAL INFORMATION RECORDED IN THE FORM OF A PHYSICAL IMAGE ON A TRANSPARENT THERMOPLASTIC FILM COMPRISING: MEANS FOR APPLYING LIGHT RADIATION TO SAID FILM; OPTICAL MEANS FOR LIMITING THE RADIATION THAT IS RECEIVED AT THE OUTPUT OF SAID FILM SO THAT ONLY SUCH RADIATION WHICH IS MODULATED BY SAID RECORDED IMAGE IS EFFECTIVELY TRANSMITTED FROM SAID THERMOPLASTIC FILM; AN IMAGE CAMERA TUBE HAVING A PHOTOCONDUCTIVE TARGET FOR SCANNING SAID TRANSMITED MODULATED RADIATION, SAID PHOTOCONDUCTIVE TARGET HAVING A LOW ELECTRICAL CAPACITANCE SO THAT VERY HIGH FREQUENCY SIGNAL INFORMATION MAY BE PROCESSED; AND A UTILIZATION CIRCUIT COUPLED TO THE OUTPUT OF SAID IMAGE CAMERA TUBE INCLUDING AN ELECTRONIC NETWORK TO COMPENSATE FOR THE PHOTOCONDUCTIVE LAG OF THE TARGET.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |