Patent US3857549A successfully refreshed from Google Patents.
US3857549A
Expired / Lapsed
US
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Photoelectrophoretic imaging apparatus
Assignee: Xerox Corp
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Filing: 1973-01-26
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Granted: 1974-12-31
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Expires: 1993-01-26
Abstract
Abstract A device for photoelectrophoretic imaging wherein a localized electric field is developed by a transparent electrode-coronode system, in conjunction with an imaging suspension. As a result of a non-homogeneous electric field developed in the imaging suspension, upon exposure selectively to an electromagnetic radiation source through the transparent electrode, an image is formed in the non-illuminated areas on the surface of the transparent electrode.
Inventors
- 👤 C Snelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:58
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/24; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0163; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A photoelectrophoretic imaging apparatus comprising in combination; an optically transparent electrode, means for presenting a photoelectrophoretic imaging suspension to said transparent electrode, said means comprising at least one container and spaced apart from said electrode, means to selectively deform the surface of a photoelectrophoretic imaging suspension so as to cause it to contact the imaging surface of said electrode, said means comprising at least one coronode positioned in said container, said coronode being spaced apart from and in electrical contact with said electrode, and means for projecting an image onto said electrode at the station where said electrode is selectively contacted by said imaging suspension opposite said coronode.
Claim 2
Dependent Claim
108 words
A photoelectrophoretic imaging apparatus comprising in combination; an optically transparent electrode, means for presenting a photoelectrophoretic imaging suspension to said transparent electrode, said means comprising at least one container and spaced apart from said electrode, means to selectively deform the surface of a photoelectrophoretic imaging suspension so as to cause it to contact the imaging surface of said electrode, said means comprising at least one coronode positioned in said container, said coronode being spaced apart from and in electrical contact with said electrode, and means for projecting an image onto said electrode at the station where said electrode is selectively contacted by said imaging suspension opposite said coronode.
Claim 3
Dependent Claim
23 words
The apparatus as defined in claim 1 and further including means for transferring a developed image from the surface of said transparent electrode.
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |