US4278746A
Expired / Lapsed
US
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Photosensitive elements for electrophotography
Assignee: Konica Minolta Inc
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Filing: 1979-06-14
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Granted: 1981-07-14
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Expires: 1999-06-14
Abstract
Abstract A photosensitive element for electrophotography which comprises a conductive support, a charge generating layer containing a charge generating substance, and a charge transporting layer. The element comprises a polymeric binder containing a charge transporting substance represented by the formula (I). ##STR1## wherein n represents 0 or 1, R 1 , R 2 and R 3 each represent an aryl group, and R 4 and R 5 each represent a hydrogen, an alkyl group having 1-4 carbon atoms, an aryl group or an aralkyl group, provided that R 4 and R 5 are not simultaneously a hydrogen, and when n is 0, R 4 is not hydrogen.
Inventors
- 👤 Satoshi Goto
- 👤 Yoshiaki Takei
- 👤 Ichiro Imaho
- 👤 Hiroyuki Nomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
A photosensitive element for electrophotography which element comprises a conductive support, a charge generating layer containing a charge generating substance, and a charge transporting layer; said charge transporting layer comprising a polymeric binder containing a charge transporting substance represented by the following general formula ##STR5## wherein n represents 0 or 1, R 1 , R 2 and R 3 each represent an aryl group, and R 4 and R 5 each represent a hydrogen, an alkyl group having 1-4 carbon atoms, an aryl group or an aralkyl group, provided that R 4 and R 5 are not simultaneously a hydrogen, and when n is 0, R 4 is not hydrogen.
Claim 2
Dependent Claim
110 words
A photosensitive element for electrophotography which element comprises a conductive support, a charge generating layer containing a charge generating substance, and a charge transporting layer; said charge transporting layer comprising a polymeric binder containing a charge transporting substance represented by the following general formula ##STR5## wherein n represents 0 or 1, R 1 , R 2 and R 3 each represent an aryl group, and R 4 and R 5 each represent a hydrogen, an alkyl group having 1-4 carbon atoms, an aryl group or an aralkyl group, provided that R 4 and R 5 are not simultaneously a hydrogen, and when n is 0, R 4 is not hydrogen.
Claim 3
Dependent Claim
24 words
A photosensitive element according to claim 1 wherein an aryl group for R 1 , R 2 and R 3 is a phenyl group.
Claim 4
Dependent Claim
95 words
A photosensitive element according to claim 1 wherein the charge transporting substance represented by the following general formula (II). ##STR6## wherein n represents 0 or 1, R 6 , R 7 and R 8 each represent a hydrogen, an amino, a dialkylamino, a diarylamino, a diaralkylamino or an alkoxy, and R 9 and R 10 each represent a hydrogen, an alkyl having 1-4 carbon atoms, an aryl group or an aralkyl group, provided that R 9 and R 10 are not simultaneously a hydrogen, and when n is 0, R 9 is not a hydrogen.
Claim 5
Dependent Claim
20 words
A photosensitive element according to claim 1 wherein the charge generating substance is an organic dye or an organic pigment.
Claim 6
Dependent Claim
16 words
A photosensitive element according to claim 1 wherein the charge generating substance is an inorganic photoconductor.
Claim 7
Dependent Claim
40 words
A photosensitive element according to claim 1 wherein the polymeric binder is selected from the group consisting of acrylic resins, methacrylic resins, polycarbonate resins, polyester resins, vinyl chloride-vinyl acetate copolymers, vinylidene chloride-acrylonitrile copolymers, polyvinyl chloride resins and polyvinylidene chloride resins.
Claim 8
Dependent Claim
27 words
A photosensitive element according to claim 1 wherein the charge transporting layer is adjacent thereto the charge generating layer, and the former is thicker than the latter.
Claim 9
Dependent Claim
23 words
A photosensitive element according to claim 1 wherein the charge transporting substance is present in the charge transporting layer in a dispersed state.
References Cited (Backward Citations)
US3837851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |