US2752271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic cleaning of xerographic plates
Assignee: Xerox Corp
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Filing: 1955-10-05
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Granted: 1956-06-26
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Expires: 1975-10-05
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Walkup
- 👤 Jr Herbert E Carlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:36
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0035; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF CLEANING A RESIDUAL XEROGRAPHIC IMAGE COMPRISING PARTICULATE MATERIAL REMAINING AFTER TRANSFER OF THE DEVELOPED IMAGE FROM THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER OF A XEROGRAPHIC PLATE, SAID METHOD COMPRISING PLACING A NEGATIVE ELECTROSTATIC CHARGE ON THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER CARRYING THE RESIDUAL IMAGE TO MAKE THE COMPOSITE SURFACE OF THE XEROGRAPHIC PLATE AND THE RESIDUAL IMAGE ELECTROSTATICALLY NEGATIVE, AND RAPIDLY BRUSHING THE SURFACE TO REMOVE THE RESIDUAL IMAGE.
Claim 2
Independent Claim
75 words
THE METHOD OF CLEANING A RESIDUAL XEROGRAPHIC IMAGE COMPRISING PARTICULATE MATERIAL REMAINING AFTER TRANSFER OF THE DEVELOPED IMAGE FROM THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER OF A XEROGRAPHIC PLATE, SAID METHOD COMPRISING PLACING A NEGATIVE ELECTROSTATIC CHARGE ON THE SURFACE OF THE PHOTOCONDUCTIVE INSULATING LAYER CARRYING THE RESIDUAL IMAGE TO MAKE THE COMPOSITE SURFACE OF THE XEROGRAPHIC PLATE AND THE RESIDUAL IMAGE ELECTROSTATICALLY NEGATIVE, AND RAPIDLY BRUSHING THE SURFACE TO REMOVE THE RESIDUAL IMAGE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-26 | 1959-12-26 | 1960-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-26 | 1963-12-26 | 1964-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-26 | 1967-12-26 | 1968-06-26 | $7700.00 | Window Closed / Lapsed |