Patent US3351920A successfully refreshed from Google Patents.
US3351920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic computer memory storage system
Assignee: Xerox Corp
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Filing: 1964-01-02
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Granted: 1967-11-07
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Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 David C Harper
- 👤 Raymond T Wright
- 👤 James E Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:08
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048; G03; G03G; G03G16/00; H; H04; H04N; H04N5/00; H04N5/76; H04N5/80; H04N5/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A COMPUTER MEMORY STORAGE SYSTEM COMPRISING: A LIGHT SOURCE OPERATIVE TO PRODUCE A LIGHT SPOT, MEANS FOR TRACKING SAID LIGHT SPOT IN A PREDETERMINED PATTERN, AND MEANS TO MODULATE SAID LIGHT SPOT IN ACCORDANCE WITH THE INTELLIGENCE TO BE STORED DURING A RECORD MODE, MEANS TO SET SAID LIGHT SPOT AT A FIXED HIGH INTENSITY DURING A READ MODE, A PHOTOSENSITIVE MEDIUM HAVING AN ELECTROSTATICALLY DEFORMABLE SURFACE, A FIRST LENS SYSTEM COMPRISING AN OBJECTIVE OPTICAL LENS FOR IMAGING SAID LIGHT SPOT ON SAID DEFORMABLE SURFACE, MEANS FOR FORMING ON SAID SURFACE A LATENT ELECTROSTATIC IMAGE OF SAID INTELLIGENCE, AND MEANS FOR DEFORMING SAID SURFACE IN ACCORDANCE WITH SAID ELECTROSTATIC IMAGE TO RETAIN SAID IMAGE; A MASK POSITIONED ON SAID OBJECTIVE LENS FOR MASKING SAID LIGHT SPOT, PHOTOMULTIPLIER TUBE SYSTEM OPERATIVE TO CONVERT A LIGHT BEAM INTO ELECTRICAL SIGNALS, SAID PHOTOMULTIPLIER TUBE INCLUDING AN APERTURE ADAPTED TO RECEIVE SAID LIGHT, A SECOND LENS SYSTEM COMPRISING A COLLECTIVE OPTICAL LENS FOR IMAGING SAID MASK ON SAID APERTURE OF SAID PHOTOMULTIPLIER TUBE, SAID DEFORMED SURFACE OPERATIVE TO DIFFUSE SAID MASKED LIGHT SOURCE TO SCATTER SAID LIGHT TO SAID COLLECTIVE LENS THEREBY PERMITTING LIGHT TO ENTER THROUGH SAID APERTURE IN SAID PHOTOMULTIPLIER.
Claim 2
Dependent Claim
198 words
A COMPUTER MEMORY STORAGE SYSTEM COMPRISING: A LIGHT SOURCE OPERATIVE TO PRODUCE A LIGHT SPOT, MEANS FOR TRACKING SAID LIGHT SPOT IN A PREDETERMINED PATTERN, AND MEANS TO MODULATE SAID LIGHT SPOT IN ACCORDANCE WITH THE INTELLIGENCE TO BE STORED DURING A RECORD MODE, MEANS TO SET SAID LIGHT SPOT AT A FIXED HIGH INTENSITY DURING A READ MODE, A PHOTOSENSITIVE MEDIUM HAVING AN ELECTROSTATICALLY DEFORMABLE SURFACE, A FIRST LENS SYSTEM COMPRISING AN OBJECTIVE OPTICAL LENS FOR IMAGING SAID LIGHT SPOT ON SAID DEFORMABLE SURFACE, MEANS FOR FORMING ON SAID SURFACE A LATENT ELECTROSTATIC IMAGE OF SAID INTELLIGENCE, AND MEANS FOR DEFORMING SAID SURFACE IN ACCORDANCE WITH SAID ELECTROSTATIC IMAGE TO RETAIN SAID IMAGE; A MASK POSITIONED ON SAID OBJECTIVE LENS FOR MASKING SAID LIGHT SPOT, PHOTOMULTIPLIER TUBE SYSTEM OPERATIVE TO CONVERT A LIGHT BEAM INTO ELECTRICAL SIGNALS, SAID PHOTOMULTIPLIER TUBE INCLUDING AN APERTURE ADAPTED TO RECEIVE SAID LIGHT, A SECOND LENS SYSTEM COMPRISING A COLLECTIVE OPTICAL LENS FOR IMAGING SAID MASK ON SAID APERTURE OF SAID PHOTOMULTIPLIER TUBE, SAID DEFORMED SURFACE OPERATIVE TO DIFFUSE SAID MASKED LIGHT SOURCE TO SCATTER SAID LIGHT TO SAID COLLECTIVE LENS THEREBY PERMITTING LIGHT TO ENTER THROUGH SAID APERTURE IN SAID PHOTOMULTIPLIER.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |