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US3536483A
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Method of making electrographs wherein the resultant electrostatic image is not effected by further light exposure
Assignee: Katsuragawa Electric Co Ltd
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Filing: 1965-08-20
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Granted: 1970-10-27
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Expires: 1985-08-20
Abstract
Abstract An electrographic apparatus in which a relative movement is established between a photosensitive element exhibiting persistent internal polarization and a corona discharge device while an optical system creates a light image through the corona discharge device, opposite polarity field charges are created in the photosensitive element in succession, and the light image is formed in the element during the second field charge whereby a latent image is created electrostatically in the photosensitive element corresponding to the projected light image.
Inventors
- 👤 Yoshiyuki Watanabe
- 👤 Koichi Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G15/00; G03G15/056; G03G5/02; G03G5/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2825814A
Cited
US2833930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |