US3676117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrophotography
Assignee: Katsuragawa Electric Co Ltd
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Filing: 1968-10-09
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Granted: 1972-07-11
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Expires: 1988-10-09
Abstract
Abstract IN A METHOD OF ELECTROGRAPHY COMPRISING THE STEPS OF APPLYING A FIRST FIELD OF ONE POLARITY ACROSS A PHOTOSENSITIVE ELEMENT INCLUDING A PHOTOCONDUCTIVE LAYER AND A HIGHLY INSULATED LAYER INTEGRALLY BONDED TO ONE SIDE OF THE PHOTOCONDUCTIVE LAYER AND APPLYING A SECOND FIELD OF OPPOSITE POLARITY CONCURRENTLY WITH OR BEFORE PROJECTION OF A LIGHT IMAGE WHEREBY TO FORM AN ELECTROSTATIC LATENT IMAGE CORRESPONDING TO THE LIGHT IMAGE ON THE SURFACE OF THE HIGHLY INSULATIVE LAYER, UNIFORM LIGHT IS PROJECTED ON THE PHOTOSENSITIVE ELEMENT ON THE SIDE OPPOSITE TO THAT OF THE HIGHLY INSULATIVE LAYER CONCURRENTLY WITH OR PRIOR OR SUBSEQUENT TO THE APPLICATION OF THE FIRST FIELD.
Inventors
- 👤 Koichi Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:58
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G13/00; G03G13/056; G03G5/147; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |