Radiation-conductive Composition Contains Carbocyclic Ring Only Patents (Class 430/70)
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Patent number: 4743523Abstract: A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.Type: GrantFiled: March 27, 1986Date of Patent: May 10, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
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Patent number: 4737427Abstract: A optical recording medium which comprises a substrate and a recording layer of at least two J-aggregates of dyes formed on the substrate is described. The dyes may be photochromic dyes or other types of dyes capable of forming the aggregates which have narrower absorption spectral ranges than original dyes. A plurality of information bits can be written in the recording layer by irradiation of one laser beam spot. The recording layer is formed by an LB film method or a method capable of fluidizing a dye solution in a direction horizontal to the substrate surface. A recording method using the medium is also described.Type: GrantFiled: March 5, 1986Date of Patent: April 12, 1988Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Jinsei Miyazaki, Eiji Ando, Kimiaki Yoshino, Kazuhisa Morimoto
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Patent number: 4708921Abstract: The present invention relates to a photosensitive material for use in electrophotography, characterized by having a photosensitive layer containing a disazo pigment having the following general formula (I), ##STR1## wherein A represents a coupler residue.Type: GrantFiled: January 21, 1986Date of Patent: November 24, 1987Assignee: Ricoh Co., Ltd.Inventor: Mitsuru Hashimoto
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Patent number: 4666809Abstract: An electrophotographic photosensitive member having a conductive substrate and a photosensitive layer, which is characterized in that the photosensitive layer comprises a binder and at least one hydrazone compound represented by the following general formula (1) or (2): ##STR1## In the formula; R.sub.11 and R.sub.12 independently of each other represent alkyl, aralkyl, or phenyl, each substituted or unsubstituted, or R.sub.11 and R.sub.12 form a 5- or 6-membered ring residue conjointly with the nitrogen atom to which they are bonded; R.sub.13 and R.sub.14 independently of each other represent alkyl or alkoxy; R.sub.15 and R.sub.16 independently of each other represent alkyl, aralkyl, or aryl, wherein the aralkyl and the aryl are substituted or unsubstituted; and n represents a integer of 0 or 1. ##STR2## In the formula; R.sub.21 and R.sub.22 independently of each other represent alkyl, aralkyl, or phenyl, each substituted or unsubstituted, or R.sub.21 and R.sub.Type: GrantFiled: July 1, 1985Date of Patent: May 19, 1987Assignee: Canon Kabushiki KaishaInventors: Masakazu Matsumoto, Masataka Yamashita
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Patent number: 4661429Abstract: A photoelectrographic element comprising a conductive layer in electrical contact with an acid photogenerating layer which (a) is free of photopolymerizable materials and (b) comprises an electrically insulating binder and an acid photogenerator is disclosed. A method for forming images with the element is also disclosed.Type: GrantFiled: April 28, 1986Date of Patent: April 28, 1987Assignee: Eastman Kodak CompanyInventors: Michel F. Molaire, Samir Y. Farid
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Patent number: 4631242Abstract: An electrophotographic material comprises a conductive support and a light-sensitive layer containing at least one of the azo compound of the formulas [I]-[III]:formula [I]:Cp.sub.1 --N.dbd.N--A--N.dbd.N--Cp.sub.2A represents a divalent residue which bonds through C atoms to N atoms which constitute azo and Cp.sub.1 is a group of by the formula: ##STR1## Z represents a substituted or unsubstituted carbocyclic aromatic ring, a substituted or unsubstituted heterocyclic aromatic ring or a unsaturated monocyclic hydrocarbon ring and R represents an aryl group containing one or two CF.sub.3 groups and Cp.sub.2 is a coupler residue different from said Cp.sub.1 and is selected from following formulas (a)-(f): ##STR2## Z.sup.1 and Z.sup.2 represent a substituted or unsubstituted aromatic hydrocarbon ring or substituted or unsubstituted hetero ring, R.sup.1 and R.sup.2 represent substituted or unsubstituted alkyl, aralkyl, aryl or hetero ring group, R.sup.3 represents an alkyl or carboxyl group or an ester thereof, R.Type: GrantFiled: September 5, 1985Date of Patent: December 23, 1986Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuhiro Emoto, Kozo Haino, Akira Itoh
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Patent number: 4622280Abstract: Disazo compounds represented by the following general formula (I) are disclosed. The compounds can function as effective photoconductive substances and further, as efficient charge carrier (both electron and positive hole) generating compounds in an electrophotographic photoreceptor: ##STR1## (wherein X represents atoms necessary to form an aromatic ring, such as a naphthalene ring, an anthracene ring, etc., or a netero ring, such as an indole ring, a carbazole ring, a dibenzofuran ring etc., (all of which rings may be either substituted ones or nonsubstituted ones) by combining with the benzene ring to which a hydroxyl group and a group Y are attached; Y represents ##STR2## R.sup.1 represents an alkyl group, a phenyl group or a substituted group thereof; R.sup.2 represents a hydrogen atom, a lower alkyl group, a carbamoyl group, a carboxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a substituted or a nonsubstituted amino group; R.sup.3 and R.sup.Type: GrantFiled: July 16, 1985Date of Patent: November 11, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Kouichi Kawamura, Seiji Horie, Hideo Sato
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Patent number: 4619990Abstract: Polymeric dyes having pendent chromophore groups which are selected from azo, tricyanovinyl, anthraquinone, methine, and indoaniline groups fall into two classes, [A] condensation polymers, and [B] polymers derived from copolymerized ethylenically-unsaturated monomers, the dyes being capable of undergoing thermoplastic deformation by a focused laser beam when in a layer of thickness in the range of 0.1 to 100 micrometers and having an absorptivity in the range of 10 to 250 Lg.sup.-1 cm.sup.-1. They are film-forming, thermally- and light-stable, and solvent-coatable. These compounds are useful as coloring and light-absorbing agents, particularly as the light-absorbing agents in thin optical recording layers.Type: GrantFiled: March 11, 1985Date of Patent: October 28, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mohamed A. Elmasry
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Patent number: 4617151Abstract: 2- or 2,3-substituted 5,6,11,12-tetraseleneotetracene or -tetrathiotetracene of the formula ##STR1## in which X is S or Se, R is alkoxy, hydroxyalkoxy, aryloxy, cycloalkoxy, aralkoxy, --OH, --NH.sub.2, --Cl, --Br or substituted amino and Y is hydrogen or --COR. The compounds can be bonded as side groups to polymers. The polymers and the compounds combine with electron acceptors to form charge transfer complexes which can be used as electrically conductive layers.Type: GrantFiled: March 15, 1985Date of Patent: October 14, 1986Assignee: Ciba-Geigy CorporationInventors: Carl W. Mayer, Vratislav Kvita, Josef Pfeifer
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Patent number: 4606987Abstract: An electrophotographic photosensitive material has a photosensitive layer formed on an electroconductive substrate, with the photosensitive layer containing a polymeric binder and an organic photoconductor represented by the following formulaA--CH.dbd.CH).sub.n CH.dbd.NNHYwherein A is selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 14 carbon atoms, an aryl group having 6 to 20 carbon atoms and a heterocyclic residue of a 3- to 30- membered ring,wherein n is 1 or 2,Y is selected from the group consisting of --SO.sub.2 R', ##STR1## wherein R' is selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 14 carbon atoms, an aryl group having 6 to 20 carbon atoms and a heterocyclic residue of a 3- to 30- membered ring, and R.sup.2 and R.sup.3, R.sup.4 and R.sup.5, either form a ring together with the nitrogen atom to which R.sup.2 and R.sup.3, R.sup.4 and R.sup.5 are bonded and in this case R.sup.Type: GrantFiled: July 9, 1985Date of Patent: August 19, 1986Assignee: Toray Industries, Inc.Inventors: Kazuo Matsuura, Hiroki Osedo, Keisuke Ohshima
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Patent number: 4594304Abstract: An electrophotographic light-sensitive material is described, comprising, provided on an electrically conductive support, a light-sensitive layer containing at least one hydrazone compound selected from particular groups of hydrazone compounds.Type: GrantFiled: March 5, 1985Date of Patent: June 10, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Shu Watarai, Seiji Horie
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Patent number: 4594303Abstract: An electrophotographic photoreceptor which has an electrophotographic photoreceptive layer containing as a charge generating material a particular organic compound having the general formula described hereinafter in this disclosure in a combination with a charge transporting material. The compounds improve upon the sensitivity, durability and selectivity to photosensitive wavelengths of photoreceptors. Furthermore, the photoreceptors can be easily manufactured.Type: GrantFiled: August 28, 1985Date of Patent: June 10, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Seiji Horie, Masayoshi Nagata, Junji Nakano, Hideo Sato
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Patent number: 4569895Abstract: An article having improved electrostatic charge transfer properties. The improvement in charge transfer properties results from subjecting a layer of photoconductive-insulative material or dielectric material on the charge donor or a layer of dielectric material on the charge receptor, or both layers, to plasma treatment process to provide an oxygen-enriched surface to the photoconductive-insulative layer and/or the dielectric layer.Type: GrantFiled: October 30, 1984Date of Patent: February 11, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: Stephen J. Willett, Hsin H. Chou, Carol E. Hendrickson, William A. Hendrickson
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Patent number: 4556623Abstract: An electroconductive porous film is described comprising a porous film substrate having deposited thereon an electroconductive organic polymer containing an electron acceptor as a doptant, substantially comprising a linear polymer having as a main repeating unit thereof a quinonediimine structure represented by formula (III). ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, each represents a hydrogen atom or an alkyl group.Type: GrantFiled: December 31, 1984Date of Patent: December 3, 1985Assignee: Nitto Electric Industrial Co., Ltd.Inventors: Shohei Tamura, Sadamitsu Sasaki, Takeshi Sasaki, Hisashi Ichinose, Keiji Nakamoto, Masao Abe, Hitoshi Nakazawa
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Patent number: 4554231Abstract: An improved electrophotographic photosensitive member is composed of a layer containing a hydrazone compound represented by the formula ##STR1## wherein R.sub.2 and R.sub.3 are each unsubstituted alkyl or substituted alkyl, unsubstituted aralkyl or substituted aralkyl, or unsubstituted aryl or substituted aryl, with the proviso that R.sub.2 and R.sub.3 are not simultaneously alkyls, n is 1 or 2, when n is 1, A represents ##STR2## wherein R.sub.1 is C.sub.1 -C.sub.5 alkyl, unsubstituted aralkyl, or substituted aralkyl, and when n is 2, A represents a direct single bond between two ##STR3## radicals.Type: GrantFiled: December 9, 1983Date of Patent: November 19, 1985Assignees: Canon Kabushiki Kaisha, Copyer Kabushiki KaishaInventors: Shozo Ishikawa, Kiyoshi Sakai, Minoru Mabuchi, Katsunori Watanabe, Makoto Kitahara
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Patent number: 4548886Abstract: A radiation sensitive organic thin film comprising a compound which has at least one nucleus of azulanium salt.Type: GrantFiled: June 3, 1983Date of Patent: October 22, 1985Assignee: Canon Kabushiki KaishaInventors: Kazuharu Katagiri, Yoshihiro Oguchi, Yoshio Takasu
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Patent number: 4537847Abstract: Photoreceptor for electrophotography comprising a conductive support and an overlaying photosensitive layer thereon, said photosensitive layer containing at least one azo compound of Formula I or II ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3 and Ar.sub.4 each is an aromatic hydrocarbon ring radical or an aromatic heterocyclic ring radical; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is an electron attractive group or hydrogen provided that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is an electron attractive group; and A is ##STR2## wherein X is a hydroxy group or a group represented by the formula: ##STR3## wherein R.sub.6 and R.sub.7 each is hydrogen or an alkyl group, and R.sub.8 is an alkyl or aryl group; Y is halogen, an alkyl or alkoxy group, a carboxy group, a sulfo group, a carbamoyl or sulfamoyl group; Z is an atomic group necessary for making an aromatic hydrocarbon ring or an aromatic heterocyclic ring; R.sub.Type: GrantFiled: August 10, 1984Date of Patent: August 27, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Jiro Takahashi, Kiyoshi Sawada, Akira Kinoshita, Tawara Komamura, Satoshi Goto, Osamu Sasaki
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Patent number: 4515883Abstract: Stilbene derivatives of the formula (I) ##STR1## and distyryl derivatives of the formula (II), ##STR2## as defined in the specification, and an electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer overlayed thereon comprising at least one of the above derivatives, are disclosed.Type: GrantFiled: March 30, 1984Date of Patent: May 7, 1985Assignee: Ricoh Company, Ltd.Inventor: Masaomi Sasaki
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Patent number: 4513071Abstract: A process for recording an erasable pattern which comprises selective deaggregation of an aggregate dye complex layer of a recording element. As a result, a color change occurs in the selected areas. In preferred embodiments, the pattern is produced by selectively exposing the layer to laser light. The pattern can be erased by exposing the layer to an appropriate solvent, or by heating the aggregate dye complex.Type: GrantFiled: November 21, 1983Date of Patent: April 23, 1985Assignee: Eastman Kodak CompanyInventor: William Mey
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Patent number: 4508803Abstract: Disclosed are the use of novel squaraine compositions selected from the group consisting of bis(2-fluoro-4-methylbenzylaminophenyl)squaraine, bis(2-fluoro-4-methyl-p-chlorobenzylaminophenyl)squaraine, bis(2-fluoro-4-methyl-p-fluorobenzylphenyl)squaraine, and bis(2-fluoro-4-methyl-m-chlorobenzylaminophenyl)squaraine, in photoresponsive devices, particularly layered photoresponsive devices which are sensitive to infrared and/or visible illumination.Type: GrantFiled: December 5, 1983Date of Patent: April 2, 1985Assignee: Xerox CorporationInventors: Kock-Yee Law, Frank C. Bailey
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Patent number: 4500621Abstract: Electrographic imaging process and electrographic plates utilized therein are provided wherein the photoconductive layer comprises a squaric acid methine dye admixed with a binder or a photoconductive material. The photoconductive layer may also comprise the squaric acid methine dye, a binder and a charge transport material.Type: GrantFiled: April 11, 1983Date of Patent: February 19, 1985Assignee: Ricoh Systems, Inc.Inventor: Herbert K. Wurster
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Patent number: 4499167Abstract: Photoconductive compositions composed of an organic photoconductor or a dye-sensitized organic photoconductor are disclosed. The composition have their sensitivity increased by the addition of an amide compound to the photoconductive composition. The photoconductive compositions are used in constructing electrophotographic light-sensitive materials having sufficiently high sensitivity for practical use. Various specific amide compounds which have been found to be effective are disclosed.Type: GrantFiled: December 14, 1982Date of Patent: February 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Kenji Sano, Syunichi Kondo, Hideo Sato
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Patent number: 4480019Abstract: Disclosed is a photosensitive material for electrophotography, which comprises a photosensitive layer containing a disazo pigment represented by the following formula: ##STR1## wherein R.sub.1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R.sub.2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and Y stands for a group represented by the following formula: ##STR2## in which B stands for a benzene, naphthalene, indole, carbazole or benzofuran ring or a substitution product thereof, which is fused to the benzene ring, Ar.sub.1 and Ar.sub.2 stand for a benzene ring, a naphthalene ring, a dibenzofuran ring or a substitution product thereof, R.sub.3 stands for a lower alkyl group, a carboxyl group or a carboxyl ester group, and R.sub.Type: GrantFiled: April 12, 1983Date of Patent: October 30, 1984Assignee: Mita Industrial Co., Ltd.Inventors: Teruaki Higashiguchi, Kaname Nakatani, Nobuhiro Miyakawa
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Patent number: 4447513Abstract: Disclosed is a photosensitive material for electrophotography, which comprises a photosensitive layer containing a tetrakis-azo pigment represented by the following formula: ##STR1## wherein X.sub.1 stands for a lower alkyl group, a lower alkoxy group or a halogen atom, X.sub.2 and X.sub.3 stand for a lower alkyl group, a lower alkoxy group, a halogen atom or a hydrogen atom, and Y stands for a group represented by the following group: ##STR2## in which Z stands for an aromatic ring such as a benzene or naphthalene ring, a substitution product thereof, a hetero ring such as an indole, carbazole or benzofuran ring, or substitution product thereof, Ar.sub.1 stands for an aromatic ring such as a benzene or naphthalene ring, a substitution product thereof, a hetero ring such as a dibenzofuran ring, or a substitution product thereof, Ar.sub.2 and Ar.sub.3 stand for an aromatic ring such as a benzene or naphthalene ring or a substitution product thereof, R.sub.Type: GrantFiled: January 25, 1983Date of Patent: May 8, 1984Assignee: Mita Industrial Co., Ltd.Inventors: Nobuhiro Miyakawa, Teruaki Higashiguchi, Yumiko Sano, Masatomi Funato
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Patent number: 4427753Abstract: An electrophotographic photosensitive member comprises a layer containing at least one azo pigment represented by the following formula (I): ##STR1## in the formula, Cp represents a coupler residue; A.sub.1 and A.sub.2 each represent a divalent organic residue; n represents 0 or 1; and when n is 0, A.sub.3 represents substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or --(CH.dbd.CH).sub.l --R', wherein R' is a substituted or unsubstituted heterocyclic ring residue an l is 0, 1 or 2, and when n is 1, A.sub.3 represents a divalent organic residue.Type: GrantFiled: May 24, 1982Date of Patent: January 24, 1984Assignee: Canon Kabushiki KaishaInventors: Naoto Fujimura, Takashi Tanaka, Takeshi Fujita, Masakazu Matsumoto, Norie Takebayashi, Yoshio Takasu, Shozo Ishikawa
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Patent number: 4426432Abstract: There is disclosed an electrophotosensitive receptor which comprises a conductive support and an electrophotosensitive layer which comprises a carrier transporting material and a specified trisazo compound wherein the azo compound is applied as a coating solution containing a solvent or as a liquid dispersion mixture containing a dispersion medium. Alternatively, the electrophotosensitive receptor comprises a conductive support and an electrophotosensitive layer which comprises said azo compound wherein the azo compound is applied as a coating solution containing a solvent and a binder or as a liquid dispersion medium containing a dispersion medium and a binder.Type: GrantFiled: April 26, 1982Date of Patent: January 17, 1984Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kiyoshi Sawada, Satoshi Goto, Osamu Sasaki, Jiro Takahashi, Tawara Komamura
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Patent number: 4420548Abstract: An electrophotographic photosensitive member is characterized by having a layer containing at least one of hydrazone group compounds represented by the following formula (1) or of ketazine group compounds represented by the following formula (2): ##STR1## In the formula, R.sub.11 and R.sub.12 independently of one another represent hydrogen, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic radical; R.sub.13 and R.sub.14 independently of one another represent subsituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic radical; and R.sub.15 represents a divalent organic residue. ##STR2## In the formula, R.sub.21, R.sub.22, R.sub.23, and R.sub.24 independently one another represent substituted or unsubstituted alkyl, substituted or substituted aralkyl, or substituted or unsubstituted aryl, or R.sub.21 and R.sub.Type: GrantFiled: November 16, 1981Date of Patent: December 13, 1983Assignee: Canon Kabushiki KaishaInventors: Kiyoshi Sakai, Minoru Mabuchi, Toshiko Suzuki, Yuji Egarashi, Shozo Ishikawa
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Patent number: 4396694Abstract: An electrophotographic sensitive material is described comprising an electrophotographic sensitive layer containing a compound represented by the formula (1) ##STR1## wherein R.sup.1 and R.sup.2 each represents an unsubstituted or substituted straight chain or branched chain alkyl group having from 1 to 12 carbon atoms, an unsubstituted or substituted straight chain or branched chain aralkyl group having from 7 to 20 carbon atoms or an aryl group consisting of a monovalent group consisting of an unsubstituted or substituted monocyclic aromatic hydrocarbon or polycyclic aromatic hydrocarbon having from 2 to 4 nuclei from which a hydrogen atom is removed; R.sup.3 represents an unsubstituted or substituted straight chain or branched chain alkyl group having from 1 to 12 carbon atoms, an unsubstituted or substituted aralkyl group having from 7 to 20 carbon atoms or an unsubstituted or substituted aryl group; and R.sup.4 and R.sup.Type: GrantFiled: December 17, 1981Date of Patent: August 2, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Masayoshi Nagata, Seiji Horie, Junji Nakano, Hideo Sato
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Patent number: 4391889Abstract: An electrophotographic photosensitive member comprises a layer containing at least one member of the hydrazone compounds of the formula: ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, and substituted or unsubstituted aryl, and R.sub.1 and R.sub.2 can not be simultaneously alkyl; and R.sub.4 is substituted or unsubstituted aryl.Type: GrantFiled: November 23, 1981Date of Patent: July 5, 1983Assignee: Canon Kabushiki KaishaInventors: Minoru Mabuchi, Kiyoshi Sakai, Shozo Ishikawa, Yuji Egashira, Makoto Kitahara
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Patent number: 4388392Abstract: Disclosed is a laminated photosensitive plate for electrophotography, which comprises a conductive substrate, a charge generating layer containing a photoconductive organic pigment, which is formed on the surface of the substrate, and a charge transporting layer formed on the charge generating layer, wherein the charge transporting layer is formed of a homogeneous composition comprising an electron-donative polymeric photoconductor and a fused ring-containing, electron-donative polycyclic aromatic hydrocarbon incorporated in the polymeric photoconductor in an amount of 0.05 to 3 parts by weight per part by weight of the polymeric photoconductor.Type: GrantFiled: April 8, 1981Date of Patent: June 14, 1983Assignee: Mita Industrial Co., Ltd.Inventors: Yoshiaki Kato, Akira Fushida
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Patent number: 4379823Abstract: A photoconductive layer embodies the combination of an organic photoconductive donor compound, such as poly(N-vinyl) carbazole and derivatives thereof, and an acceptor-sensitizer compound having the general formula ##STR1## in which M is a metal such as boron, aluminum, gallium, indium and thallium, X and Y are oxygen sulphur, nitrogen, phosphorus, antimony or selenium, Z.sub.1 and Z.sub.2 are halogen, or substituted or unsubstituted alkyl, alkaryl or heterocyclic groups, R.sub.1 and R.sub.2 are substituted or unsubstituted aryl, alkaryl, alkyl or alicyclic groups, and n is 2 or 3.Type: GrantFiled: May 27, 1980Date of Patent: April 12, 1983Assignee: A. B. Dick CompanyInventor: James M. Halm
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Patent number: 4367273Abstract: An electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound represented by the general formula (I): ##STR1## (wherein R.sup.1 and R.sup.2 are an alkyl, aralkyl or aryl group which may or may not have a substituent, n is a number of 1 or 2, and A is an aromatic hydrocarbyl group or aromatic heterocyclic group which may or may not have a substituent) and a binder.Type: GrantFiled: February 19, 1981Date of Patent: January 4, 1983Assignee: Mitsubishi Chemical Industries LimitedInventors: Tetsuo Murayama, Shigenori Otsuka, Tsunemitsu Tajima
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Patent number: 4359515Abstract: An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR1## wherein A represents a single chemical bond, a divalent hydrocarbon group containing a conjugated double bond, a divalent hydrocarbon group containing a nitrogen atom in a conjugated double bond, or a divalent heterocyclic group which may be condensed with a benzene ring or substituted and forms a conjugated double bond system in combination with the adjacent azomethine groups, and B and B', which may be the same or different, each represents a coupler having aromatic properties.Type: GrantFiled: February 25, 1981Date of Patent: November 16, 1982Assignees: Copyer Co., Ltd., Canon Inc.Inventors: Kazuharu Katagiri, Katsunori Watanabe, Shigeto Ohta, Shozo Ishikawa, Makoto Kitahara
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Patent number: 4316943Abstract: Electroductive article comprising a coating composition of copolymers containing from 70 percent to 85 percent by weight diallyldimethylammonium chloride and at least 15 percent but less than 30 percent by weight N-methylolacrylamide and optional comonomers is disclosed. These electroconductive polymers are coated onto a substrate and become water-insensitive thereafter.Type: GrantFiled: December 12, 1980Date of Patent: February 23, 1982Assignee: Calgon CorporationInventors: Gloria D. Sinkovitz, Kenneth W. Dixon
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Patent number: 4315983Abstract: 2,6-Di-tert-Butyl-4-substituted thiopyrylium salt represented by formula (I), a process for production of said salt and a photoconductive composition containing said salt. ##STR1## wherein Z.sup..crclbar. is an anion, X is a hydrogen atom, an aryl group, a substituted aryl group or an alkyl group, and R.sup.1 and R.sup.2 are the same or different and include alkyl groups.Type: GrantFiled: July 14, 1980Date of Patent: February 16, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Kawamura, Harumi Katsuyama, Hideo Sato
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Patent number: 4294739Abstract: A coating composition useful in forming conductive layers comprises a conductive, water-dispersible, particulate polymer and a crosslinkable latex binder. The crosslinkable latex has a first glass transition temperature before crosslinking of substantially less than 50.degree. C. and a second glass transition temperature after crosslinking and coalescing of substantially greater than 50.degree. C. wherein the first and second glass transition temperatures differ by more than 4.degree. C. The coating composition can be coated on a variety of supports to produce conductive elements. The coating compositions are particularly useful in forming photographic elements which are resistant to the buildup of static charge and ferrotyping.Type: GrantFiled: April 26, 1979Date of Patent: October 13, 1981Assignee: Eastman Kodak CompanyInventors: Donald A. Upson, Gerald A. Campbell, Diane E. Kestner
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Patent number: 4283475Abstract: 2,6-Di-tert-butyl-4-[5-(2,6-di-tert-butyl-4H-thiopyran-4-ylidene)penta-1,3- dienyl]thiopyrylium salts, which are novel, colorless, transparent, having an adsorption in the far infrared to near infrared region and capable of imparting high sensitivity to photoconductive substance; process for producing the salts; and a photoconductive composition containing the salt.Type: GrantFiled: August 20, 1980Date of Patent: August 11, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Kawamura, Harumi Katsuyama, Hideo Sato
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Patent number: 4278747Abstract: An electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound represented by the general formula (I): ##STR1## (wherein R.sup.1 and R.sup.2 are an alkyl, aralkyl or aryl group which may or may not have a substituent, n is a number of 1 or 2, and A is an aromatic hydrocarbyl group or aromatic heterocyclic group which may or may not have a substituent) and a binder.Type: GrantFiled: April 26, 1979Date of Patent: July 14, 1981Assignee: Mitsubishi Chemical Industries LimitedInventors: Tetsuo Murayama, Shigenori Otsuka, Tsunemitsu Tajima
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Patent number: 4250237Abstract: High speed organic photoconductors are produced by crystallizing p-terphenyl from solution in a solvent having defined solubility parameter limits. Heterogeneous photoconductive insulating compositions comprising a dispersion of these p-terphenyls in an electrically insulating binder can be applied to an electrically conducting support to provide an electrophotographic element with high photoconductive speed.Type: GrantFiled: May 25, 1977Date of Patent: February 10, 1981Assignee: Eastman Kodak CompanyInventor: Richard S. Vickers
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Patent number: 4195990Abstract: Electrophotographic papers comprising electrically conducting paper supports and photoconductive insulating compositions in the form of organic photoconductive dispersions are described. Particles of certain polyphenyl organic photoconductors with para-linked phenyl groups, or polyarylated unsaturated organic photoconductors are dispersed in cellulose nitrate to provide useful photoconductive insulating dispersions.Type: GrantFiled: May 25, 1977Date of Patent: April 1, 1980Assignee: Eastman Kodak CompanyInventors: William J. Staudenmayer, Michael T. Regan, James A. Van Allan, William E. Yoerger