US3121007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-active member for xerography
Assignee: Xerox Corp
•
Filing: 1958-02-12
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Granted: 1964-02-11
•
Expires: 1978-02-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Middleton
- 👤 Donald C Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:44
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/0528; G03G5/0532; G03G5/0553; G03G5/0557; G03G5/056; G03G5/08; G03G5/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD COMPRISING APPLYING AN ELECTRIC FIELD THROUGH A TWO-PHASE LAYER OF PHOTOCONDUCTIVE INSULATING MATERIAL COMPRISING A UNIFORM HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL HAVING DISPERSED THEREIN FROM ABOUT 5 TO ABOUT 50% BY WEIGHT OF A PARTICULATE INORGANIC PHOTOCONDUCTIVE CRYSTALLINE PIGMENT THEREBY FORMING A CHEMICALLY DISTINCT PHASE IN SAID HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL AND PROJECTING AN IMAGE ONTO SAID LAYER WHEREBY A FLOW OF ELECTRICITY TAKES PLACE THROUGH SAID LAYER BY GENERATION OF CHARGE CARRIERS IN SAID HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL AND BY INJECTION OF CHARGE CARRIERS FROM SAID PHOTOCONDUCTIVE CRYSTALLINE PIGMENT INTO SAID HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL WHEREBY THE LIGHT SENSITIVITY OF THE LAYER IS INCREASED PRODUCING AN ELECTROSTATIC IMAGE AT A SURFACE THEREOF, SAID ELECTROSTATIC IMAGE BEING DEVELOPABLE BY ELECTROSCOPIC MARKING PARTICLES.
Claim 2
Independent Claim
123 words
THE METHOD COMPRISING APPLYING AN ELECTRIC FIELD THROUGH A TWO-PHASE LAYER OF PHOTOCONDUCTIVE INSULATING MATERIAL COMPRISING A UNIFORM HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL HAVING DISPERSED THEREIN FROM ABOUT 5 TO ABOUT 50% BY WEIGHT OF A PARTICULATE INORGANIC PHOTOCONDUCTIVE CRYSTALLINE PIGMENT THEREBY FORMING A CHEMICALLY DISTINCT PHASE IN SAID HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL AND PROJECTING AN IMAGE ONTO SAID LAYER WHEREBY A FLOW OF ELECTRICITY TAKES PLACE THROUGH SAID LAYER BY GENERATION OF CHARGE CARRIERS IN SAID HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL AND BY INJECTION OF CHARGE CARRIERS FROM SAID PHOTOCONDUCTIVE CRYSTALLINE PIGMENT INTO SAID HOMOGENEOUS PHOTOCONDUCTIVE INSULATING MATERIAL WHEREBY THE LIGHT SENSITIVITY OF THE LAYER IS INCREASED PRODUCING AN ELECTROSTATIC IMAGE AT A SURFACE THEREOF, SAID ELECTROSTATIC IMAGE BEING DEVELOPABLE BY ELECTROSCOPIC MARKING PARTICLES.
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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) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |