Patent US2378802A successfully refreshed from Google Patents.
Patent US2742631A successfully refreshed from Google Patents.
US2742631A
Expired / Lapsed
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Method and apparatus for recording and transmitting information using phosphors
Assignee: RCA Corp
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Filing: 1954-05-27
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Granted: 1956-04-17
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Jan A Rajchman
- 👤 Humboldt W Leverenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:03
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/12; G11; G11C; G11C13/00; G11C13/04; G11C13/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN APPARATUS FOR RECORDING IMFORMATION RECEIVED FROM A FIRST SOURCE IN THE FORM OF ELECTRICAL CURRENT VARIATIONS, SAID APPARATUS COMPRISING A SECOND SOURCE OF RADIATIONS HAVING EMISSION WITH A RANGE OF RELATIVELY SHORT WAVELENGTHS, MEANS FOR MODULATING SAID RADIATIONS WITH SAID CURRENT VARIATIONS, A PHOSPHOR-COATED SUBSTRATE POSITIONED SO THE PHOSPHOR COATING IS RESPONSIVE TO SAID MODULATED RADIATIONS, THE PHOSPHOR BEING OF A TYPE WHICH STORES ENERGY WHEN EXCITED WITH SAID SHORT WAVELENGTH RADIATIONS AND IS LATER ABLE TO EMIT RADIATIONS OF INTERMEDIATE WAVELENGTH WHEN STIMULATED WITH RADIATIONS OF WAVELENGTH LONGER THAN SAID INTERMEDIATE WAVELENGTH, MEANS FOR APPLYING RADIATIONS FROM SAID SECOND SOURCE TO SAID PHOSPHOR COATING AND MEANS FOR SUBSEQUENTLY APPLYING TO SAID PHOSPHOR COATING RADIATIONS OF SAID LONGER WAVELENGTH, THE IMPROVEMENT CONSISTING OF MEANS FOR APPLYING RADIATIONS FROM SAID SECOND SOURCE IN THE FORM OF PULSES, AND MEANS FOR DIRECTING EACH OF SAID PULSES TO ONE OF A PLURALITY OF LONGITUDINAL CHANNELS ARRANGED IN PARALLEL RELATION ACROSS SAID PHOSPHOR COATING.
Claim 2
Dependent Claim
161 words
IN APPARATUS FOR RECORDING IMFORMATION RECEIVED FROM A FIRST SOURCE IN THE FORM OF ELECTRICAL CURRENT VARIATIONS, SAID APPARATUS COMPRISING A SECOND SOURCE OF RADIATIONS HAVING EMISSION WITH A RANGE OF RELATIVELY SHORT WAVELENGTHS, MEANS FOR MODULATING SAID RADIATIONS WITH SAID CURRENT VARIATIONS, A PHOSPHOR-COATED SUBSTRATE POSITIONED SO THE PHOSPHOR COATING IS RESPONSIVE TO SAID MODULATED RADIATIONS, THE PHOSPHOR BEING OF A TYPE WHICH STORES ENERGY WHEN EXCITED WITH SAID SHORT WAVELENGTH RADIATIONS AND IS LATER ABLE TO EMIT RADIATIONS OF INTERMEDIATE WAVELENGTH WHEN STIMULATED WITH RADIATIONS OF WAVELENGTH LONGER THAN SAID INTERMEDIATE WAVELENGTH, MEANS FOR APPLYING RADIATIONS FROM SAID SECOND SOURCE TO SAID PHOSPHOR COATING AND MEANS FOR SUBSEQUENTLY APPLYING TO SAID PHOSPHOR COATING RADIATIONS OF SAID LONGER WAVELENGTH, THE IMPROVEMENT CONSISTING OF MEANS FOR APPLYING RADIATIONS FROM SAID SECOND SOURCE IN THE FORM OF PULSES, AND MEANS FOR DIRECTING EACH OF SAID PULSES TO ONE OF A PLURALITY OF LONGITUDINAL CHANNELS ARRANGED IN PARALLEL RELATION ACROSS SAID PHOSPHOR COATING.
References Cited (Backward Citations)
US2596741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |