Patent US3844781A successfully refreshed from Google Patents.
US3844781A
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Organic photoconductive materials
Assignee: Canon Inc
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Filing: 1973-01-22
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Granted: 1974-10-29
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Expires: 1993-01-22
Abstract
Abstract A light-transparent photoconductive material for use in electrophotography is the reaction product obtained by condensing A. AN ORGANIC PHOTOCONDUCTIVE COMPOUND CONTAINING AN AMINO AND/OR HYDROXYL GROUP AND B. A REACTIVE COLORED COMPOUND CONTAINING AN ACTIVE HALOGEN ATOM; OR BY CONDENSING A. AN ORGANIC PHOTOCONDUCTIVE COMPOUND CONTAINING AN ACTIVE HALOGEN ATOM AND B. A REACTIVE COLORED COMPOUND CONTAINING AN AMINO AND/OR HYDROXYL GROUP.
Inventors
- 👤 K Tsuchiya
- 👤 N Shinichiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:12
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/02; C09B3/00; C09B39/00; C09B43/00; C09B43/32; C09B62/00; C09B62/02; C09B62/04; G; G03; G03G; G03G17/00; G03G17/04; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0644; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/12; G03G9/00; G03G9/08; G03G9/09; G03G9/0926
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
25 words
A LIGHT TRANSPARENT PHOTOCONDUCTIVE MATERIAL FOR USE IN ELECTROPHOTOGRAPHY WHICH IS THE REACTION PRODUCT OBTAINED BY CONDENSING A. THE ORGANIC PHOTPCONDUCTIVE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
25 words
A LIGHT TRANSPARENT PHOTOCONDUCTIVE MATERIAL FOR USE IN ELECTROPHOTOGRAPHY WHICH IS THE REACTION PRODUCT OBTAINED BY CONDENSING A. THE ORGANIC PHOTPCONDUCTIVE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
36 words
A light transparent photoconductive material for use in electrophotography which is the reaction product obtained by condensing a. an organic photoconductive compound being an oxydiazole compound and b. a colored substance being an azomethine pyrazolone dye.
Claim 4
Dependent Claim
36 words
A light transparent photoconductive material for use in electrophotography which is the reaction product obtained by condensing a. an organic photoconductive compound being an oxydiazole compound and b. a colored substance being an azomethine pyrazolone dye.
Claim 5
Dependent Claim
57 words
A light transparent photoconductive material for use in electrophotography which is the reaction product obtained by condensing a. an organic photoconductive compound selected from the group consisting of oxydiazole compounds, oxazole compounds and thiazole compounds; and b. a colored substance selected from the group consisting of azomethine pyrazolone dyes, azo pyrazolone dyes, azo dyes and azomethine dyes.
Claim 6
Dependent Claim
57 words
A light transparent photoconductive material for use in electrophotography which is the reaction product obtained by condensing a. an organic photoconductive compound selected from the group consisting of oxydiazole compounds, oxazole compounds and thiazole compounds; and b. a colored substance selected from the group consisting of azomethine pyrazolone dyes, azo pyrazolone dyes, azo dyes and azomethine dyes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |