Patent US3312957A successfully refreshed from Google Patents.
US3312957A
Expired / Lapsed
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Simplified access optical memory
Assignee: International Business Machines Corp
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Filing: 1963-10-25
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Granted: 1967-04-04
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Expires: 1983-10-25
Abstract
No abstract record available.
Inventors
- 👤 Fleisher Harold
- 👤 Thomas J Harris
- 👤 Shapiro Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:17
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/047; G11C11/00; G11C11/21; G11C11/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN OPTICAL MEMORY WHICH IS ACTIVATED BY A BEAM OF POLARIZED RADIATION, COMPRISING: A PLURALITY OF ELECTRO-OPTICAL MEMORY ELEMENTS LOCATED IN THE PATH OF SAID RADIATION, EACH SAID MEMORY ELEMENT DISPLAYING ELECTRO-OPTICAL REMANENCE; READ-IN MEANS FOR READING INFORMATION INTO SAID MEMORY ELEMENTS, SAID READ-IN MEANS INCLUDING A PLURALITY OF MUTUALLY PERPENDICULAR CONDUCTIVE MEANS EACH OF WHICH ELECTRICALLY BRIDGES A SINGLE MEMORY ELEMENT; FIRST ANALYZER MEANS SPACED FROM SAID MEMORY ELEMENTS IN A DIRECTION AWAY FROM THE SOURCE OF SAID RADIATION, AND ORIENTED TO EXCLUDE RADIATION OF A PRESELECTED POLARITY; A PLURALITY OF SECOND ELECTRO-OPTICAL SUBSTANCES HAVING NO ELECTRO-OPTICAL REMANENCE, SAID PLURALITY BEING SPACED FROM SAID FIRST ANALYZER MEANS IN A DIRECTION AWAY FROM THE SOURCE OF SAID RADIATION, EACH SAID SUBSTANCE BEING OPTICALLY COUPLED WITH A DIFFERENT ONE OF SAID MEMORY ELEMENTS; AND ORIENTED TO CHANGE RADIATION TO SAID PRESELECTED POLARITY WHEN ACTIVATED; MEANS TO ACTIVATE EACH OF SAID SECOND ELECTRO-OPTICAL SUBSTANCES INDIVIDUALLY;
Claim 2
Dependent Claim
153 words
AN OPTICAL MEMORY WHICH IS ACTIVATED BY A BEAM OF POLARIZED RADIATION, COMPRISING: A PLURALITY OF ELECTRO-OPTICAL MEMORY ELEMENTS LOCATED IN THE PATH OF SAID RADIATION, EACH SAID MEMORY ELEMENT DISPLAYING ELECTRO-OPTICAL REMANENCE; READ-IN MEANS FOR READING INFORMATION INTO SAID MEMORY ELEMENTS, SAID READ-IN MEANS INCLUDING A PLURALITY OF MUTUALLY PERPENDICULAR CONDUCTIVE MEANS EACH OF WHICH ELECTRICALLY BRIDGES A SINGLE MEMORY ELEMENT; FIRST ANALYZER MEANS SPACED FROM SAID MEMORY ELEMENTS IN A DIRECTION AWAY FROM THE SOURCE OF SAID RADIATION, AND ORIENTED TO EXCLUDE RADIATION OF A PRESELECTED POLARITY; A PLURALITY OF SECOND ELECTRO-OPTICAL SUBSTANCES HAVING NO ELECTRO-OPTICAL REMANENCE, SAID PLURALITY BEING SPACED FROM SAID FIRST ANALYZER MEANS IN A DIRECTION AWAY FROM THE SOURCE OF SAID RADIATION, EACH SAID SUBSTANCE BEING OPTICALLY COUPLED WITH A DIFFERENT ONE OF SAID MEMORY ELEMENTS; AND ORIENTED TO CHANGE RADIATION TO SAID PRESELECTED POLARITY WHEN ACTIVATED; MEANS TO ACTIVATE EACH OF SAID SECOND ELECTRO-OPTICAL SUBSTANCES INDIVIDUALLY;
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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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |