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Patent US4399206A successfully refreshed from Google Patents.
US4399206A
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Disazo electrophotographic photosensitive member
Assignee: Canon Inc
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Filing: 1981-09-30
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Granted: 1983-08-16
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Expires: 2001-09-30
Abstract
Abstract An electrophotographic photosensitive member is characterized by having a photosensitive layer containing at least one disazo pigment represented by the formula ##STR1## wherein Cp represents a coupler residue; B 1 , B 2 , B 1 ', and B 2 ' independently of one another represent atoms or groups selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A represents ##STR2## (D 1 and D 2 represent single bond between two ##STR3## or between two ##STR4##
Inventors
- 👤 Kazuharu Katagiri
- 👤 Katsunori Watanabe
- 👤 Shozo Ishikawa
- 👤 Makoto Kitahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:19
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/34; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0681; G03G5/0683; G03G5/0685
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
87 words
An electrophotographic photosensitive member characterized by having a conductive support, a charge transport layer and a charge generation layer which contains at least one disazo pigment of the formula: ##STR162## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR163## wherein D 1 and D 2 each is a single bond between two ##STR164## or between two ##STR165##
Claim 2
Dependent Claim
87 words
An electrophotographic photosensitive member characterized by having a conductive support, a charge transport layer and a charge generation layer which contains at least one disazo pigment of the formula: ##STR162## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR163## wherein D 1 and D 2 each is a single bond between two ##STR164## or between two ##STR165##
Claim 3
Dependent Claim
104 words
An electrophotographic photosensitive member according to claim 1, wherein Cp in formula is a coupler residue of the following formula (A), (B), (C), or (D): ##STR166## wherein ##STR167## is a naphthalene ring, an anthracene ring, a carbazole ring or a dibenzofuran ring; R 1 is hydrogen, substituted or unsubstituted alkyl, or substituted or unsubstituted aryl; and R 2 , R 3 , and R 4 are substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, or substituted or unsubstituted aryl; R 5 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, or substituted or unsubstituted aryl; and R 6 is substituted or unsubstituted aryl.
Claim 4
Dependent Claim
16 words
An electrophotographic photosensitive member according to claim 2, wherein R 1 in formula (A) is hydrogen.
Claim 5
Dependent Claim
18 words
An electrophotographic photosensitive member according to claim 2, wherein the coupler residue represented by formula (D) is ##STR168##
Claim 6
Dependent Claim
67 words
An electrophotographic photosensitive member according to claim 1, wherein said disazo pigment is represented by the formula ##STR169## wherein Cp is a coupler residue, and B 1 , B 2 , B 1 ', and B 2 ' are the same or different and each is at least one atom or group selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl.
Claim 7
Dependent Claim
24 words
An electrophotographic photosensitive member according to claim 1, wherein said disazo pigment is represented by the formula ##STR170## wherein Cp is a coupler residue.
Claim 8
Dependent Claim
34 words
An electrophotographic photosensitive member according to claim 1, wherein said disazo pigment is represented by the formula ##STR171## wherein Cp is a coupler residue, and D 1 is a single bond between two ##STR172##
Claim 9
Dependent Claim
76 words
An electrophotographic photosensitive member according to claim 1, wherein said disazo pigment is represented by the formula ##STR173## wherein Cp is a coupler residue; B 1 , B 2 , B 1 ', and B 2 ' are the same or different and each is at least one atom or group selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and D 2 is a single bond between two ##STR174##
Claim 10
Dependent Claim
20 words
An electrophotographic photosensitive member according to claim 1, which has a charge transport layer formed on said charge generation layer.
Claim 11
Dependent Claim
38 words
An electrophotographic photosensitive member according to claim 9, which has a laminated structure constituted of a conductive support, a bond layer, said charge generation layer, and a charge transport layer, the layers being laminated in the above-mentioned order.
Claim 12
Dependent Claim
16 words
An electrophotographic photosensitive member according to claim 1, wherein said charge generation layer contains a binder.
Claim 13
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 11, wherein said charge generation layer contains up to 80% by weight of the binder.
Claim 14
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 12, wherein said charge generation layer contains up to 40% by weight of the binder.
Claim 15
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 11, wherein said binder is poly(vinyl butyral) or polyester resins.
Claim 16
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 1, wherein said charge transport layer contains a hole-transporting material.
Claim 17
Dependent Claim
29 words
An electrophotographic photosensitive member according to claim 15, wherein said hole-transporting material is a compound selected from the group consisting of hydrazones, pyrazolines, oxadiazoles, oxazoles, thiazoles, triarylmethanes, and carbazoles.
Claim 18
Dependent Claim
20 words
An electrophotographic photosensitive member according to claim 16, wherein the charge transport layer contains at least one of pyrazoline compounds.
Claim 19
Dependent Claim
20 words
An electrophotographic photosensitive member according to claim 16, wherein the charge transport layer contains at least one of hydrazone compounds.
Claim 20
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 1, wherein said charge transport layer contains an electron-transporting material.
Claim 21
Dependent Claim
14 words
An electrophotographic photosensitive member according to claim 19, wherein said electron-transporting material is fluorenones.
Claim 22
Dependent Claim
83 words
An electrophotographic photosensitive member characterized by having a photosensitive layer containing a binder, a hole-transporting material and at least one disazo pigment of the formula; ##STR175## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR176## wherein D 1 and D 2 each is a single bond between two ##STR177## or between two ##STR178##
Claim 23
Dependent Claim
83 words
An electrophotographic photosensitive member characterized by having a photosensitive layer containing a binder, a hole-transporting material and at least one disazo pigment of the formula; ##STR175## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR176## wherein D 1 and D 2 each is a single bond between two ##STR177## or between two ##STR178##
Claim 24
Dependent Claim
28 words
An electrophotographic photosensitive member according to claim 21, wherein said hole-transporting material is a compound selected from the group consisting of hydrazones, pyrazolines, oxadiazoles, oxazoles, thiazoles, and triarylmethanes.
Claim 25
Dependent Claim
14 words
An electrophotographic photosensitive member according to claim 10, wherein said bond layer contains casein.
Claim 26
Dependent Claim
70 words
An electrophotographic photosensitive member characterized by having a conductive support, a charge transport layer, and a charge generation layer which contains at least one disazo pigment represented by the formula: ##STR179## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR180##
Claim 27
Dependent Claim
70 words
An electrophotographic photosensitive member characterized by having a conductive support, a charge transport layer, and a charge generation layer which contains at least one disazo pigment represented by the formula: ##STR179## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR180##
Claim 28
Dependent Claim
104 words
An electrophotographic photosensitive member according to claim 24, wherein Cp in formula is a coupler residue of the following formulae (A), (B), (C), or (D): ##STR181## wherein ##STR182## is a naphthalene ring, an anthracene ring, a carbazole ring or a dibenzofuran ring; R 1 is hydrogen, substituted or unsubstituted alkyl, or substituted or unsubstituted aryl; and R 2 , R 3 , and R 4 are substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, or substituted or unsubstituted aryl; R 5 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, or substituted or unsubstituted aryl; and R 6 is substituted or unsubstituted aryl.
Claim 29
Dependent Claim
16 words
An electrophotographic photosensitive member according to claim 25, wherein R 1 in formula (A) is hydrogen.
Claim 30
Dependent Claim
18 words
An electrophotographic photosensitive member according to claim 25, wherein the coupler residue represented by formula (D) is ##STR183##
Claim 31
Dependent Claim
20 words
An electrophotographic photosensitive member according to claim 24, which has a charge transport layer formed on said charge generation layer.
Claim 32
Dependent Claim
32 words
An electrophotographic photosensitive member according to claim 28, which has a laminated structure formed from, in sequence, a conductive layer, a bond layer, said charge generation layer, and said charge transport layer.
Claim 33
Dependent Claim
16 words
An electrophotographic photosensitive member according to claim 24, wherein said charge generation layer contains a binder.
Claim 34
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 30, wherein said charge generation layer contains up to 80% by weight of the binder.
Claim 35
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 31, wherein said charge generation layer contains up to 40% by weight of the binder.
Claim 36
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 31, wherein said binder is a poly(vinylbutyral) or polyester resin.
Claim 37
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 24, wherein said charge transport layer contains a hole-transporting material.
Claim 38
Dependent Claim
29 words
An electrophotographic photosensitive member according to claim 34, wherein said hole-transporting material is a compound selected from the group consisting of hydrazones, pyrazolines, oxadiazoles, oxazoles, thiazoles, triarylmethanes, and carbazoles.
Claim 39
Dependent Claim
19 words
An electrophotographic photosensitive member according to claim 35, wherein the charge transport layer contains at least one pyrazoline compound.
Claim 40
Dependent Claim
19 words
An electrophotographic photosensitive member according to claim 35, wherein the charge transport layer contains at least one hydrazone compound.
Claim 41
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 24, wherein said charge transport layer contains an electron-transporting material.
Claim 42
Dependent Claim
15 words
An electrophotographic photosensitive member according to claim 38, wherein said electron-transporting material is a fluorenone.
Claim 43
Dependent Claim
63 words
An electrophotographic photosensitive member characterized by having a layer containing a hole-transporting material and at least one disazo pigment represented by the formula ##STR184## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR185##
Claim 44
Dependent Claim
63 words
An electrophotographic photosensitive member characterized by having a layer containing a hole-transporting material and at least one disazo pigment represented by the formula ##STR184## wherein Cp is a coupler residue; B 1 , B 2 , B' 1 , and B' 2 are each selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A is ##STR185##
Claim 45
Dependent Claim
29 words
An electrophotographic photosensitive member according to claim 40, wherein said hole-transporting material is a compound selected from the group consisting of hydrazones, pyrazolines, oxadiazoles, oxazoles, thiazoles, triarylmethanes, and polyvinylcarbazole.
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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |