Patent US2058018A successfully refreshed from Google Patents.
Patent US3174855A successfully refreshed from Google Patents.
US3174855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for a production of a xerographic plate
Assignee: Xerox Corp
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Filing: 1961-02-23
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Granted: 1965-03-23
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Expires: 1981-02-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:13
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144; G03G5/02; G03G5/04; G03G5/043; G03G5/0433; G03G5/147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR RECORDING A PATTERN OF LIGHT AND SHADOW COMPRISING, IN SEQUENCE, DEPOSITING A SELENIUM LAYER BY ELECTROLYSIS FROM SELENIOUS ACID ONTO A CONDUCTIVE BACKING MEMBER, VAPOR DEPOSITING A LAYER COMPRISED PREDOMINANTLY OF VITREOUS SELENIUM ONTO SAID SELENIUM LAYER FIRST DEPOSITED, IN THE ABSENCE OF ACTIVATING RADIATION PLACING SENSITIZING ELECTROSTATIC CHARGES OF ONE POLARITY ON THE SURFACE OF SAID LYAER COMPRISED PREDOMINANTLY OF VITREOUS SELENIUM, EXPOSING THE THUS CHARGED SURFACE TO A PATTERN OF LIGH AND SHADOW TO BE RECORDED WHEREBY AN ELECTROSTATIC LAENT IMAGE IS FORMED CORRESPONDING TO SAID PATTERN AND DEPOSITING ELECTICALLY ATTRACTABLE FINELY DIVIDED MARKING MATERIAL SELECTIVELY IN CONFORMITY WITH THE ELECTROSTATIC IMAGE THUS PRODUCED.
Claim 2
Dependent Claim
109 words
A PROCESS FOR RECORDING A PATTERN OF LIGHT AND SHADOW COMPRISING, IN SEQUENCE, DEPOSITING A SELENIUM LAYER BY ELECTROLYSIS FROM SELENIOUS ACID ONTO A CONDUCTIVE BACKING MEMBER, VAPOR DEPOSITING A LAYER COMPRISED PREDOMINANTLY OF VITREOUS SELENIUM ONTO SAID SELENIUM LAYER FIRST DEPOSITED, IN THE ABSENCE OF ACTIVATING RADIATION PLACING SENSITIZING ELECTROSTATIC CHARGES OF ONE POLARITY ON THE SURFACE OF SAID LYAER COMPRISED PREDOMINANTLY OF VITREOUS SELENIUM, EXPOSING THE THUS CHARGED SURFACE TO A PATTERN OF LIGH AND SHADOW TO BE RECORDED WHEREBY AN ELECTROSTATIC LAENT IMAGE IS FORMED CORRESPONDING TO SAID PATTERN AND DEPOSITING ELECTICALLY ATTRACTABLE FINELY DIVIDED MARKING MATERIAL SELECTIVELY IN CONFORMITY WITH THE ELECTROSTATIC IMAGE THUS PRODUCED.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |