Patent US2803542A successfully refreshed from Google Patents.
US2803542A
Expired / Lapsed
US
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Xerographic plate
Assignee: Xerox Corp
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Filing: 1955-07-26
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Granted: 1957-08-20
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Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Osmar A Ullrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:05
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN ELECTROPHOTOGRAPHIC PROCESS COMPRISING PLACING AN ELECTROSTATIC CHARGE ON THE SURFACE OF AN ELECTROPHOTOGRAPHIC MEMBER COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER BEING A SUBSTANTIALLY VITREOUS UNIFORM MIXTURE OF BETWEEN ABOUT 0.5% AND 20% BY WEIGHT OF ARSENIC AND THE REMAINDER SUBSTANTIALLY VITREOUS SELENIUM OVERLYING AND IN ELECTRICALLY CONDUCTIVE CONTACT WITHH A CONDUCTIVE BACKING MEMBER, SELECTIVELY DISSIPATING ELECTRIC CHARGE FROM THE SURFACE OF THE CHARGED PHOTOCONDUCTIVE INSULATING LAYER BY EXPOSING THE CHARGED LAYER TO A LIGHT IMAGE THEREBY CREATING AN ELECTROSTATIC LATENT IMAGE ON THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER, AND DEVELOPING SAID ELECTROSTATIC LATENT IMAGE WITH ELECTRICALLY CHARGED POWDER PARTICLES.
Claim 2
Dependent Claim
100 words
AN ELECTROPHOTOGRAPHIC PROCESS COMPRISING PLACING AN ELECTROSTATIC CHARGE ON THE SURFACE OF AN ELECTROPHOTOGRAPHIC MEMBER COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER BEING A SUBSTANTIALLY VITREOUS UNIFORM MIXTURE OF BETWEEN ABOUT 0.5% AND 20% BY WEIGHT OF ARSENIC AND THE REMAINDER SUBSTANTIALLY VITREOUS SELENIUM OVERLYING AND IN ELECTRICALLY CONDUCTIVE CONTACT WITHH A CONDUCTIVE BACKING MEMBER, SELECTIVELY DISSIPATING ELECTRIC CHARGE FROM THE SURFACE OF THE CHARGED PHOTOCONDUCTIVE INSULATING LAYER BY EXPOSING THE CHARGED LAYER TO A LIGHT IMAGE THEREBY CREATING AN ELECTROSTATIC LATENT IMAGE ON THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER, AND DEVELOPING SAID ELECTROSTATIC LATENT IMAGE WITH ELECTRICALLY CHARGED POWDER PARTICLES.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |