US3692519A
Expired / Lapsed
US
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Electrophotographic color process
Assignee: Canon Inc
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Filing: 1969-07-14
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Granted: 1972-09-19
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Expires: 1989-07-14
Abstract
Abstract AN ELECTROPHOTOGRAPHIC PROCESS FOR PREPARING A MULTICOLORED COPY FROM A MULTI-COLORED ORIGINAL COMPRISES APPLYING A PRIMARY CHARGE ON A PHOTOSENSITIVE MEMBER, IRRADIATING AN OPTICAL IMAGE OF A COLOR WHICH IT IS DESIRED TO REPRODUCE, APPLYING A SECONDARY DISCHARGE CONTEMPORANIOUSLY WITH IRRADIATING AN OPTICAL IMAGE OF COLORS OTHER THAN SAID DESIRED COLOR, EXPOSING THE WHOLE SURFACE OF THE PHOTOSENSITIVE MEMBER IF NECESSARY, DEVELOPING THE FORMED LATENT IMAGE AND TRANSFERRING THE IMAGE CORRESPONDING TO THE IMAGE OF THE DESIRED COLOR ONTO A TRANSFER MEDIUM, AND REPEATING THESE STEPS FOR EACH COLOR OF THE MULTI-COLORED ORIGINAL.
Inventors
- 👤 Toru Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/12; G03G13/00; G03G13/01; G03G5/14; G03G5/147; G03G5/14704; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |