US3148354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric recording apparatus
Assignee: International Business Machines Corp
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Filing: 1961-12-20
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Granted: 1964-09-08
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Roland M Schaffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/326; G03G15/04; G03G15/04036; G03G15/04045; G03G19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PHOTOELECTRIC DATA RECORDING APPARATUS COMPRISING A MEMORY ELEMENT HAVING SUPERPOSED LAYERS OF PHOTOCONDUCTIVE AND FERROELECTRIC MATERIAL, MEANS FOR APPLYING UNIDIRECTIONAL POTENTIALS BEING OF A MAGNITUDE INCAPABLE OF SWITCHING DOMAINS OF SAID FERROMAGNETIC LAYER IN DARKNESS BUT CAPABLE OF SWITCHING THE POLARITY OF DOMAINS OF SAID FERROELECTRIC LAYER COINCIDENTALLY WITH THE RADIATION OF SAID PHOTOCONDUCTIVE LAYER, MEANS FOR ENERGIZING SAID PHOTOCONDUCTIVE LAYER WITH RADIANT ENERGY CAPABLE OF SWITCHING SAID PHOTOCONDUCTIVE LAYER FROM A NON-CONDUCTING SAID POTENTIAL APPLYING MEANS OPERABLE FOR COORDINATING SAID POTENTIAL APPLYING MEANS AND SAID RADIANT ENERGY MEANS FOR PRODUCING THE SWITCHING OF DOMAINS IN SAID FERROELECTRIC LAYER IN ACCORDANCE WITH A PREDETERMINED DATA PATTERN INCLUDING MEANS FOR EFFECTING A RELATIVE MOVEMENT OF SAID MEMORY ELEMENT AND SAID RADIANT ENERGY MEANS, AND MEANS FOR SELECTIVELY OPERATING SAID RADIANT ENERGY MEANS IN TIMED RELATION WITH SAID RELATIVE MOVEMENT.
Claim 2
Dependent Claim
139 words
A PHOTOELECTRIC DATA RECORDING APPARATUS COMPRISING A MEMORY ELEMENT HAVING SUPERPOSED LAYERS OF PHOTOCONDUCTIVE AND FERROELECTRIC MATERIAL, MEANS FOR APPLYING UNIDIRECTIONAL POTENTIALS BEING OF A MAGNITUDE INCAPABLE OF SWITCHING DOMAINS OF SAID FERROMAGNETIC LAYER IN DARKNESS BUT CAPABLE OF SWITCHING THE POLARITY OF DOMAINS OF SAID FERROELECTRIC LAYER COINCIDENTALLY WITH THE RADIATION OF SAID PHOTOCONDUCTIVE LAYER, MEANS FOR ENERGIZING SAID PHOTOCONDUCTIVE LAYER WITH RADIANT ENERGY CAPABLE OF SWITCHING SAID PHOTOCONDUCTIVE LAYER FROM A NON-CONDUCTING SAID POTENTIAL APPLYING MEANS OPERABLE FOR COORDINATING SAID POTENTIAL APPLYING MEANS AND SAID RADIANT ENERGY MEANS FOR PRODUCING THE SWITCHING OF DOMAINS IN SAID FERROELECTRIC LAYER IN ACCORDANCE WITH A PREDETERMINED DATA PATTERN INCLUDING MEANS FOR EFFECTING A RELATIVE MOVEMENT OF SAID MEMORY ELEMENT AND SAID RADIANT ENERGY MEANS, AND MEANS FOR SELECTIVELY OPERATING SAID RADIANT ENERGY MEANS IN TIMED RELATION WITH SAID RELATIVE MOVEMENT.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |