US3409358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic apparatus and method
Assignee: Harris Graphics Corp
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Filing: 1964-03-09
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Granted: 1968-11-05
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Expires: 1984-03-09
Abstract
No abstract record available.
Inventors
- 👤 Donald L Fauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A COUNTER-ELECTRODE SYSTEM FOR USE IN ELECTROSTATIC PHOTOGRAPHY WHEREIN AN IMAGE BEARING MEMBER INCLUDES A SUPPORT ELEMENT AND AN ELECTRICALLY INSULATING PHOTOCONDUCTIVE LAYER, THE PHOTOCONDUCTIVE LAYER FORMING AN IMAGE SURFACE HAVING DIFFERENTIALLY CHARGED IMAGE AREAS AND NON-IMAGE AREAS AND WHEREIN SAID IMAGE SURFACE IS BROUGHT INTO CONTACT WITH A LIQUID DEVELOPER, COMPRISING A CONDUCTIVE LIQUID MATERIAL FORMING A COUNTER-ELECTRODE, MEANS FOR POSITIONING SAID IMAGE BEARING MEMBER SO AS TO PLACE SAID IMAGE BEARING SURFACE, WHILE SAID SURFACE IS IN CONTACT WITH SAID LIQUID DEVELOPER, IN CLOSE PROXIMITY TO SAID CONDUCTIVE LIQUID TO CAUSE SAID COUNTER-ELECTRODE TO BE SPACED FROM SAID IMAGE BEARING SURFACE A RELATIVELY SMALL DISTANCE, AND MEANS INCLUDING ELECTRICAL CONNECTIONS TO SAID CONDUCTIVE LIQUID MATERIAL TO APPLY A POTENTIAL ACROSS SAID IMAGE BEARING SURFACE TO EFFECT FORMATION OF AN IMPRESSED ELECTRICAL FIELD OPPOSITE IN DIRECTION AND INTERMEDIATE IN STRENGTH TO THE FIELDS CREATED BY SAID IMAGE AND NON-IMAGE AREAS ON THE SURFACE OF THE IMAGE BEARING MEMBER.
Claim 2
Dependent Claim
159 words
A COUNTER-ELECTRODE SYSTEM FOR USE IN ELECTROSTATIC PHOTOGRAPHY WHEREIN AN IMAGE BEARING MEMBER INCLUDES A SUPPORT ELEMENT AND AN ELECTRICALLY INSULATING PHOTOCONDUCTIVE LAYER, THE PHOTOCONDUCTIVE LAYER FORMING AN IMAGE SURFACE HAVING DIFFERENTIALLY CHARGED IMAGE AREAS AND NON-IMAGE AREAS AND WHEREIN SAID IMAGE SURFACE IS BROUGHT INTO CONTACT WITH A LIQUID DEVELOPER, COMPRISING A CONDUCTIVE LIQUID MATERIAL FORMING A COUNTER-ELECTRODE, MEANS FOR POSITIONING SAID IMAGE BEARING MEMBER SO AS TO PLACE SAID IMAGE BEARING SURFACE, WHILE SAID SURFACE IS IN CONTACT WITH SAID LIQUID DEVELOPER, IN CLOSE PROXIMITY TO SAID CONDUCTIVE LIQUID TO CAUSE SAID COUNTER-ELECTRODE TO BE SPACED FROM SAID IMAGE BEARING SURFACE A RELATIVELY SMALL DISTANCE, AND MEANS INCLUDING ELECTRICAL CONNECTIONS TO SAID CONDUCTIVE LIQUID MATERIAL TO APPLY A POTENTIAL ACROSS SAID IMAGE BEARING SURFACE TO EFFECT FORMATION OF AN IMPRESSED ELECTRICAL FIELD OPPOSITE IN DIRECTION AND INTERMEDIATE IN STRENGTH TO THE FIELDS CREATED BY SAID IMAGE AND NON-IMAGE AREAS ON THE SURFACE OF THE IMAGE BEARING MEMBER.
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |