← Back to Patent Explorer
US3312957A Expired / Lapsed US ⏱️ 0.0 years remaining

Simplified access optical memory

Assignee: International Business Machines Corp
•
Filing: 1963-10-25
•
Granted: 1967-04-04
•
Expires: 1983-10-25
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

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 09:56
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;

References Cited (Backward Citations)

US2928075A Cited
US2936380A Cited
US3027806A Cited
US3046529A Cited
US3102998A Cited
US3155944A Cited
US3107344A Cited
US3069973A Cited
US3150356A Cited

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

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag