US4391889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive member with benzimidazole ring containing hydrazones
Assignee: Canon Inc
•
Filing: 1981-11-23
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Granted: 1983-07-05
•
Expires: 2001-11-23
Abstract
Abstract An electrophotographic photosensitive member comprises a layer containing at least one member of the hydrazone compounds of the formula: <IMAGE> (1) where R1, R2 and R3 are selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, and substituted or unsubstituted aryl, and R1 and R2 can not be simultaneously alkyl; and R4 is substituted or unsubstituted aryl.
Inventors
- 👤 Minoru Mabuchi
- 👤 Kiyoshi Sakai
- 👤 Shozo Ishikawa
- 👤 Yuji Egashira
- 👤 Makoto Kitahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:58
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
77 words
An electrophotographic photosensitive member which comprises an electrically conductive layer and a layer containing at least one member of the hydrazone compounds of the formula: ##STR12## where R 1 , R 2 and R 3 are selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, and substituted or unsubstituted aryl, and R 1 and R 2 can not be simultaneously alkyl; and R 4 is substituted or unsubstituted aryl and a binder.
Claim 2
Dependent Claim
77 words
An electrophotographic photosensitive member which comprises an electrically conductive layer and a layer containing at least one member of the hydrazone compounds of the formula: ##STR12## where R 1 , R 2 and R 3 are selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, and substituted or unsubstituted aryl, and R 1 and R 2 can not be simultaneously alkyl; and R 4 is substituted or unsubstituted aryl and a binder.
Claim 3
Dependent Claim
23 words
An electrophotographic photosensitive member according to claim 1 in which there are a layer containing the hydrazone compound and a charge generation layer.
Claim 4
Dependent Claim
31 words
An electrophotographic photosensitive member according to claim 2 in which the layer containing the hydrazone compound is a charge transport layer capable of transporting holes formed in the charge generation layer.
Claim 5
Dependent Claim
21 words
An electrophotographic photosensitive member according to claim 3 in which the charge transport layer is formed on the charge generation layer.
Claim 6
Dependent Claim
25 words
An electrophotographic photosensitive member according to claim 4 in which an adhesive layer is an intermediate between the charge generation layer and the conductive layer.
Claim 7
Dependent Claim
26 words
An electrophotographic photosensitive member according to claim 5 in which the adhesive layer contains a polymer selected from the group consisting of casein and hydroxypropyl cellulose.
Claim 8
Dependent Claim
28 words
An electrophotographic photosensitive member according to claim 1 in which the binder is a resin selected from the group consisting of acrylic resins, polycarbonate resins and polyester resins.
Claim 9
Dependent Claim
57 words
An electrophotographic photosensitive member according to claim 2 in which the charge generation layer comprises a member selected from the group consisting of cadmium sulfide, pyrylium dyes, thiopyrylium dyes, triarylmethane dyes, thiazine dyes, cyanine dyes, phthalocyanine pigments, perylene pigments, indigo pigments, thioindigo pigments, quinacridone pigments, squaric acid pigments, azo pigments and polycryclic quinone pigments, and a binder.
Claim 10
Dependent Claim
25 words
An electrophotographic photosensitive member according to claim 7 in which the charge generation layer is composed of at least a disazo dye and a binder.
Claim 11
Dependent Claim
27 words
An electrophotographic photosensitive member according to claim 2 in which the charge generation layer is composed of a film of amorphous silicon formed by a glow discharge.
Claim 12
Dependent Claim
24 words
An electrophotographic photosensitive member according to claim 2 in which the charge generation layer is composed of a vapor-deposited film of a perylene pigment.
Claim 13
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 2 in which the charge generation layer is composed of a vapor-deposited film of selenium-tellurium.
Claim 14
Dependent Claim
24 words
An electrophotographic photosensitive member according to claim 1 in which the layer contains the hydrazone compound and a charge generation material and a binder.
Claim 15
Dependent Claim
54 words
An electrophotographic photosensitive member according to claim 13 in which the charge generation material is a member selected from the group consisting of cadmium sulfide, pyrylium dyes, thiopyrylium dyes, triarylmethane dyes, thiazine dyes, cyanine dyes, phthalocyanine pigments, perylene pigments, indigo pigments, thioindigo pigments, quinacridone pigments, squaric acid pigments, azo pigments and polycryclic quinone pigments.
Claim 16
Dependent Claim
24 words
An electrophotographic photosensitive member according to claim 1 in which the layer contains the hydrazone compound, a charge generation material and a photoconductive polymer.
Claim 17
Dependent Claim
56 words
An electrophotographic photosensitive member according to claim 15 in which the charge generation material is composed of a member selected from the group consisting of cadmium sulfide, pyrylium dyes, thiopyrylium dyes, triarylmethane dyes, thiazine dyes, cyanine dyes, phthalocyanine pigments, perylene pigments, indigo pigments, thioindigo pigments, quinacridone pigments, squaric acid pigments, azo pigments and polycryclic quinone pigments.
Claim 18
Dependent Claim
15 words
An electrophotographic photosensitive member according to claim 15 in which the photoconductive polymer is poly-N-vinylcarbazole.
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |