US2955938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerography
Assignee: Xerox Corp
•
Filing: 1955-08-01
•
Granted: 1960-10-11
•
Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Frank A Steinhilper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/226; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF SENSITIZING A XEROGRAPHIC PLATE COMPRISING A SELF SUPPORTING FILM OF POTOCONDUCTIVE INSULATING MATERIAL PRIOR TO EXPOSURE AND IMAGE FORMATION IN XEROGRAPHY, SAID METHOD COMPRISING APPLYING A FIRST POLARITY CORONA GENERATED ELASTROSTATIC CHARGE TO A FIRST SURFACE OF THE PHOTOCONDUCTIVE INSULATING FILM WHILE SAID PHOTOCONDUCTIVE INSULATING LAYER IS UNIFORMLY ILLUMINATED BY RADIATION WHICH CAUSES SAID FILM TO BECOME ELECTRICALLY CONDUCTIVE AND WHILE AN ELECTRIC FIELD IS APPLIED THROUGH SAID FILM IN A DIRECTION TO MOVE ELECTROSTATIC CHARGE DIRECTED TO SAID FIRST SURFACE TO THE OPPOSITE AND SECOND SURFACE OF SAID PHOTOCONDUCTIVE INSULATING FILM SAID
Claim 2
Independent Claim
96 words
THE METHOD OF SENSITIZING A XEROGRAPHIC PLATE COMPRISING A SELF SUPPORTING FILM OF POTOCONDUCTIVE INSULATING MATERIAL PRIOR TO EXPOSURE AND IMAGE FORMATION IN XEROGRAPHY, SAID METHOD COMPRISING APPLYING A FIRST POLARITY CORONA GENERATED ELASTROSTATIC CHARGE TO A FIRST SURFACE OF THE PHOTOCONDUCTIVE INSULATING FILM WHILE SAID PHOTOCONDUCTIVE INSULATING LAYER IS UNIFORMLY ILLUMINATED BY RADIATION WHICH CAUSES SAID FILM TO BECOME ELECTRICALLY CONDUCTIVE AND WHILE AN ELECTRIC FIELD IS APPLIED THROUGH SAID FILM IN A DIRECTION TO MOVE ELECTROSTATIC CHARGE DIRECTED TO SAID FIRST SURFACE TO THE OPPOSITE AND SECOND SURFACE OF SAID PHOTOCONDUCTIVE INSULATING FILM SAID
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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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |