US3933664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic photoconductive toner materials
Assignee: Canon Inc
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Filing: 1974-11-06
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Granted: 1976-01-20
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Expires: 1994-11-06
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
- 👤 Shinichiro Nagashima
- 👤 Kaichi Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:22
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B39/00; C09B43/00; C09B43/32; C09B62/00; C09B62/02; C09B62/04; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631; G03G5/0664; G03G5/0675; G03G5/0679; G03G9/00; G03G9/08; G03G9/09; G03G9/0926; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner is the reaction product obtained by condensing a. the organic photoconductive compound of the formula ##SPC7## and b. the colored substance of the formula ##SPC8##
Claim 2
Dependent Claim
45 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner is the reaction product obtained by condensing a. the organic photoconductive compound of the formula ##SPC7## and b. the colored substance of the formula ##SPC8##
Claim 3
Dependent Claim
46 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner 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
46 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner 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
75 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner is the reaction product obtained by condensing a. an organic photoconductive compound selected from the group consisting of oxydiazole compounds, oxazole compounds, thiazole compounds, imidazole compounds, carbazole compounds and polycarbazole compounds; and b. a colored substance selected from the group consisting of azomethine pyrazolone dyes, azo pyrazolone dyes, azo dyes, azomethine dyes and anthraquinone dyes.
Claim 6
Dependent Claim
75 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner is the reaction product obtained by condensing a. an organic photoconductive compound selected from the group consisting of oxydiazole compounds, oxazole compounds, thiazole compounds, imidazole compounds, carbazole compounds and polycarbazole compounds; and b. a colored substance selected from the group consisting of azomethine pyrazolone dyes, azo pyrazolone dyes, azo dyes, azomethine dyes and anthraquinone dyes.
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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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |