Containing Amino Or Substituted Amino Group Patents (Class 430/73)
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Patent number: 5204198Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and a nonionic sulfonic acid photogenerator. A method of forming images with this element is also disclosed.Type: GrantFiled: October 28, 1991Date of Patent: April 20, 1993Assignee: Eastman Kodak CompanyInventors: Douglas E. Bugner, Jeanne E. Kaeding, Michel F. Molaire
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Patent number: 5202408Abstract: A polyarylamine polymer represented by the following formula: ##STR1## wherein: n is between about 5 and about 5,000p is between about 5 and about 5,000X' and X" are independently selected from a group having bifunctional linkages, andQ is a divalent group derived from certain hydroxy terminated arylamine reactants.Type: GrantFiled: November 25, 1991Date of Patent: April 13, 1993Assignee: Xerox CorporationInventors: John F. Yanus, William W. Limburg, Dale S. Renfer, Damodar M. Pai
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Patent number: 5173383Abstract: An electrophotographic photosensitive member comprises an electroconductor support and a photosensitive layer formed thereon.Type: GrantFiled: December 23, 1991Date of Patent: December 22, 1992Assignee: Canon Kabushiki KaishaInventors: Yoshio Kashizaki, Hajime Miyazaki, Toshie Miyaji
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Patent number: 5171651Abstract: Disclosed is a double-layered type electrophotographic photoreceptor which comprises an electroconductive support and a carrier generation layer containing a pigment or a dye as a carrier generation material and a carrier transport layer which are provided on said support, wherein the carrier transport layer contains an organic low molecular weight carrier transport material, a binder resin, a hydroquinone compound represented by the following formula (II): ##STR1## wherein R.sup.7, R.sup.8, R.sup.9 and R.sup.10 each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, a carbamoyl group or an alkylthio group, and a compound represented by the following formula (III): ##STR2## wherein R.sup.11, R.sup.12, R.sup.13 and R.sup.14 each represents a hydrogen atom, a hydroxyl group, an alkyl group or an alkoxy group with a proviso that at least one of R.sup.11 -R.sup.14 is hydroxyl group, R.sup.15 and R.sup.Type: GrantFiled: November 8, 1990Date of Patent: December 15, 1992Assignee: Mitsubishi Paper Mills LimitedInventors: Kazuchiyo Takaoka, Makoto Okaji, Hideya Arisue
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Patent number: 5168026Abstract: A bis-azo compound represented by the following general formula and an electrophotographic photosensitive member having a light receiving layer containing said bis-azo compound. ##STR1## [wherein, two of the substituent groups R.sub.1 to R.sub.4 are respectively an azo group having a coupler residue which is bonded either directly or through a phenyl ring to the diphenoquinone skeleton, and the remaining two substituent groups are respectively hydrogen atom, alkyl group, alkenyl group, hydroxyl group, alkoxy group, carboxyl group, aryl group, halogen atom or cyano group wherein the two substituent groups may be identical or different each other, and Z is oxygen atom or sulfur atom.Type: GrantFiled: February 11, 1992Date of Patent: December 1, 1992Assignee: Mita Industrial Co., Ltd.Inventor: Eiichi Miyamoto
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Patent number: 5168025Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the formula (I): ##STR1## wherein each of Ar.sup.1 and Ar.sup.2 which may be the same or different, is an arylene group which may have substituents, each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which may be the same or different, is an alkyl group which may have substituents, an aryl group which may have substituents, or a heterocyclic group which may have substituents, provided that R.sup.1 may, together with R.sup.2 or Ar.sup.1, form a ring containing the adjacent nitrogen atom, and R.sup.3 may, together with R.sup.4 or Ar.sup.2, form a ring containing the adjacent nitrogen atom, each of R.sup.5, R.sup.6, R.sup.7 and R.sup.Type: GrantFiled: September 11, 1991Date of Patent: December 1, 1992Assignee: Mitsubishi Kasei CorporationInventors: Hitoshi Ono, Atsuo Saita
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Patent number: 5166019Abstract: The present invention relates to a photosensitive member comprising a specified distyryl compound as a charge transporting material. The specified distyryl compound may be used in combination with a specified silicone oil and a specified butyrated phenol.Type: GrantFiled: December 17, 1991Date of Patent: November 24, 1992Assignee: Minolta Camera Kabushiki KaishaInventors: Hideaki Ueda, Shigeaki Tokutake, Keiichi Inagaki
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Patent number: 5162181Abstract: There is disclosed the electrophotographic photoreceptor having a high sensitivity and a low residual potential as well as an excellent durability in repeated use. The photoreceptor comprises a photoreceptive layer containing the bisazo compound represented by the following Formula I: ##STR1## wherein R.sub.1 represents a hydrogen atom, a nitro group, a cyano group, an alkyl group, or an alkoxy group; Z represents the group of non-metal atoms necessary to form an aromatic hydrocarbon ring or an aromatic heterocyclic ring by condensation with benzene ring; and R.sub.2 to R.sub.6 each represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, an alkyl group, and an alkoxy group.Type: GrantFiled: March 12, 1991Date of Patent: November 10, 1992Assignee: Konica CorporationInventors: Shingo Fujimoto, Toyoko Shibata, Osamu Sasaki
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Patent number: 5158850Abstract: An electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon comprising as an effective component at least one polyether compound represented by formula (I): ##STR1## wherein Ar represents a phenylene group or a biphenylene group; R.sup.1 and R.sup.2 each represent an alkyl group which may have a substituent, or an aryl group which may have a substituent; and n is an integer of 1 to 4. Furthermore, charge transporting material comprising the above polyether compound, polyether compounds having formula (II) for use in the electrophotographic photoconductor and a method of preparing the same are disclosed, ##STR2## wherein m is an integer of 1 or 2.Type: GrantFiled: December 13, 1990Date of Patent: October 27, 1992Assignee: Ricoh Company, Ltd.Inventors: Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada
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Patent number: 5153094Abstract: A process which comprises adding a pigment to a solution of trihaloacetic acid and toluene; adding the solution to a nonsolvent for the pigment; and separating the product from the solution.Type: GrantFiled: June 14, 1990Date of Patent: October 6, 1992Assignee: Xerox CorporationInventors: Peter M. Kazmaier, James M. Duff, Gordon K. Hamer, Charles G. Allen, Sandra J. Gardner
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Patent number: 5145760Abstract: High resolution, photosensitive electrostatic master which is positive-working with a single imagewise exposure comprising a conductive support bearing a layer of a photosensitive composition consisting essentially of (a) at least two polymeric binders, at least one binder having a Tg greater than 80.degree. C. and at least one binder having a Tg of 70.degree. C. or less such that the shift in transit time (a.sub.T) of the photosensitive layer in the range of 30%.ltoreq.relative humidity.ltoreq.60% and 65.degree. F. (18.3.degree. C.).ltoreq.temperature .ltoreq.80.degree. F. (26.7.degree. C.) is 10 or less, (b) a hexaarylbiimidazole photooxidant, (c) leuco dye, preferably stabilized, oxidized by (b), (d) a nonionic halogenated compound, preferably a hydrocarbon, and (e) at least one compatible plasticizer. A process of making positive images by a single imagewise exposure is described.Type: GrantFiled: October 26, 1990Date of Patent: September 8, 1992Assignee: E. I. Du Pont de Nemours and CompanyInventors: Graciela B. Blanchet-Fincher, Catherine T. Chang, Richard J. Kempf
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Patent number: 5139913Abstract: A photosensor having a photoconductive layer made of built-up monomelecular membranes containing a squarylium pigment represented by the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents an alkyl group.Type: GrantFiled: May 21, 1990Date of Patent: August 18, 1992Assignee: Fuji Xerox Co., Ltd.Inventors: Suk Kim, Makoto Furuki, Lyong S. Pu
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Patent number: 5132189Abstract: A photoconductor for electrophotography includes an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel azo compound as a charge generating substance therein. One example of the azo compound is represented by general formula: ##STR1## wherein A stands for a coupler residue, and each of R.sub.1 and R.sub.2 is one of a hydrogen atom, a halogen atom, an alkyl group and an alkoxy group.Type: GrantFiled: September 4, 1990Date of Patent: July 21, 1992Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
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Patent number: 5106712Abstract: A novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge carrier-transporting compound and a charge carrier-generating compound or a charge carrier-transporting compound-containing layer and a charge-generating compound-containing layer, characterized in that as said charge carrier-generating compound there is contained a novel bisazo compound represented by the general formula (1-A), (1-B) or (1-C):Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--.sub.n Ar.sup.2 --N.dbd.N--Cp (1-A)wherein Ar.sup.1 and Ar.sup.2 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent heterocyclic aromatic group; Cp represents a coupler residue; and n represents an integer 2 or 3;Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--Ar.sup.2 --C.tbd.C--Ar.sup.3 --C.tbd.C--Ar.sup.4 --N.dbd.N--Cp (1-B)wherein Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.Type: GrantFiled: July 6, 1990Date of Patent: April 21, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsugi Kitatani, Naonori Makino, Satoshi Hoshi
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Patent number: 5104758Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate having thereon a photosensitive layer is disclosed, wherein the photosensitive layer contains, as a charge generating material, a dispersion of selenium or a selenium alloy and at least one squarylium compound represented by formula (I): ##STR1## wherein A represents a fluorine atom, a hydrogen atom or a hydroxyl group, with B representing a hydroxyl group; or A represents a hydrogen atom or a fluorine atom, with B representing a methyl group, in the same binder resin. The electrophotographic photoreceptor not only has broad spectral sensitivity from the visible to infrared region but is excellent in other electrophotographic properties.Type: GrantFiled: May 11, 1990Date of Patent: April 14, 1992Assignee: Fuji Xerox Co, Ltd.Inventors: Kiyokazu Mashimo, Ryosaku Igarashi, Ichiro Takegawa, Yasuo Sakaguchi, Shigetoshi Nakamura, Kohichi Yamamoto
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Patent number: 5102758Abstract: A process for the preparation of phthalocyanine composites which comprises adding a metal free phthalocyanine, a metal phthalocyanine, a metalloxy phthalocyanine or mixtures thereof to a solution of trifluoroacetic acid and a monohaloalkane; adding to the resulting mixture a titanyl phthalocyanine; adding the resulting solution to a mixture that will enable precipitation of said composite, and recovering the phthalocyanine composite precipitated product.Type: GrantFiled: July 23, 1991Date of Patent: April 7, 1992Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Hai-Yen T. Tran, James M. Duff, James D. Mayo, Gordon K. Hamer, Terry L. Bluhm, Cheng K. Hsiao
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Patent number: 5098809Abstract: An electrophotographic photosensitive member comprises a conductive support and a photosensitive layer provided thereon. The photosensitive layer contains a fluorene compound represented by the following Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group; R.sub.3 represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom; R.sub.4 and R.sub.5 each represent a hydrogen atom, an alkyl group, an aralkyl group or an aryl group.Type: GrantFiled: February 28, 1990Date of Patent: March 24, 1992Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Akihiro Senoo, Tetsuro Kanemaru, Ryoji Yashiro
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Patent number: 5098807Abstract: An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising as an effective component at least one [2,2]paracyclophane compound formula (I): ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl group having 1 to 4 carbon atoms, which may have a substituent, or an aryl group which may have a substituent; R.sup.3 and R.sup.4 each represent hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, or a halogen; and m is an integer of 1 to 3, and n is an integer of 1 to 4, and R.sup.3 and R.sup.4 may be the same or different when m and n are both 2 or more. Furthermore, novel [2,2]paracyclophane compounds for use in the electrophotographic photoconductor and methods of producing the same are disclosed.Type: GrantFiled: October 31, 1989Date of Patent: March 24, 1992Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Tamotsu Aruga
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Patent number: 5093219Abstract: A novel electrophotographic photoreceptor is provided comprising a light-sensitive layer containing at least one of acetylene compounds represented by general formula (I) provided on an electrically conductive support:Ar.sup.1 C.tbd.C--AR.sup.3 --C.tbd.C--AR.sup.2 (I)wherein Ar.sup.1 and Ar.sup.2 each represents an aromatic carbon ring or aromatic heterocyclic group; and Ar.sup.3 represents an arylene group, divalent condensed polycyclic aromatic group or divalent aromatic heterocyclic group.Type: GrantFiled: August 17, 1990Date of Patent: March 3, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Satoshi Hoshi, Katsugi Kitatani
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Patent number: 5093218Abstract: An electrophotographic photosensitive member comprising: a conductive substrate and a photosensitive layer on the conductive substrate, said photosensitive layer containing an azo pigment of the following formula (1):CP.sub.1 --N.dbd.N--Ar.sub.1 --(N.dbd.N--Ar.sub.2)--N.dbd.N--Cp.sub.2. . . (1)wherein Ar.sub.1 and Ar.sub.2 are each a substituted or unsubstituted aromatic cyclic group optionally bonded through a bonding group or a substituted or unsubstituted heterocyclic group optionally bonded through a bonding group, and cp.sub.1 and cp.sub.2 are each a group having the following formula (2), (3), (4) or (5): ##STR1## wherein R.sub.1 and R.sub.Type: GrantFiled: October 19, 1990Date of Patent: March 3, 1992Assignee: Canon Kabushiki KaishaInventors: Toshie Miyaji, Hajime Miyazaki, Yoshio Kashizaki
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Patent number: 5089366Abstract: Disclosed is an electrophotographic photoreceptor which is high in sensitivity and endurance and which comprises an electroconductive support and, provided thereon, a photosensitive layer which contains a hydrozone compound represented by the following formula [I], [II], or [III]: ##STR1## wherein the various subgroups designated by R or A are as described in the specification.Type: GrantFiled: January 3, 1990Date of Patent: February 18, 1992Assignee: Mitsubishi Paper Mills LimitedInventors: Kozo Haino, Akira Itoh, Makoto Okaji, Kazuhiro Emoto, Tatsuya Kodera, Kazuchiyo Takaoka
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Patent number: 5080991Abstract: An electrophotographic photoreceptor comprising a photosensitive layer which contains one or more hydrazone compounds represented by the formula: ##STR1## wherein A represents a substituted or unsubstituted aryl or heterocyclic group; R.sup.1, R.sup.2 and R.sup.5 are the same or different from each other and independently represent a hydrogen atom, or a substituted or unsubstituted alkyl or aryl group; R.sup.3 and R.sup.4 are the same or different from each other and independently represent a hydrogen atom, a halogen atom, a nitro group, or a substituted or unsubstituted alkyl, alkoxy, aryl or aryloxy group; R.sup.6 represents a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl or alkoxy group; R.sup.Type: GrantFiled: August 17, 1990Date of Patent: January 14, 1992Assignee: Mitsubishi Kasei CorporationInventors: Hitoshi Ono, Atsuo Saita
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Patent number: 5079119Abstract: A photoreceptor having at least a light-sensitive layer, which photoreceptor contains a compound represented by the following general formula (1): ##STR1## where Ar.sup.1, Ar.sup.2 and Ar.sup.3 each represents a substituted or unsubstituted alkyl group,a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, provided that Ar.sup.1 and Ar.sup.2 may form a ring together with the nitrogen atom to which they are bound; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom, a halogen atom, an alkoxy group, or a substituted or unsubstituted alkyl group.Type: GrantFiled: February 22, 1990Date of Patent: January 7, 1992Assignee: Konica CorporationInventors: Shinichi Suzuki, Hirofumi Hayata, Osamu Sasaki
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Patent number: 5077160Abstract: The fluorinated squaraines ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are independently selected from alkyl or aryl; X is hydrogen, hydroxy, alkyl, alkoxy or halogen; n is a number of 1 to about 3; and m is a number of from 0 to 2; and imaging members thereof.Type: GrantFiled: May 18, 1990Date of Patent: December 31, 1991Assignee: Xerox CorporationInventors: Kock-Yee Law, F. Courtney Bailey
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Patent number: 5077164Abstract: The present invention relates to a photosensitive member with a photosensitive layer on or over an electrically conductive substrate, in which the photosensitive layer comprises at least one of azo pigments selected from the group consisting of azo pigments represented by the following general formulas [I], [II] and [III]. ##STR1## in which Z.sub.1 is a residual group of a condensed ring excluding the benzene ring and the carbonyl group in the formula [I]; Z.sub.2 is a residual group of a condensed ring excluding the naphthalene ring and the carbonyl group in the formula [II]; Z.sub.1 and Z.sub.2 may have a substituent respectively; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent independently a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, a hydroxy group or a nitro group; Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4 and Ar.sub.5 represent independently an arylene group which may have a substituent; Ar.sub.Type: GrantFiled: June 20, 1990Date of Patent: December 31, 1991Assignee: Minolta Camera Kabushiki KaishaInventors: Hideaki Ueda, Takamasa Ueda, Masakazu Takata
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Patent number: 5077163Abstract: An electrophotographic photoreceptor having a layer that contain at least one compound represented by the following general formula (I): ##STR1## where R.sub.1 and R.sub.2 each represents an optionally substituted alkyl, aralkyl, aryl or heterocyclic group, provided that R.sub.1 and R.sub.2 may combine to form a cyclic amino group containing a nitrogen atom; X.sub.1 and X.sub.2 each represents a hydrogen atom, a hydroxyl group, a lower alkyl group having 1-5 carbon atoms, a lower alkoxy group having 1-5 carbon atoms, a halogen atom, an allyl group, an aryl group or an acylamino group.Type: GrantFiled: May 30, 1990Date of Patent: December 31, 1991Assignee: Konica CorporationInventors: Hirofumi Hayata, Osamu Sasaki, Shinichi Suzuki
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Patent number: 5047304Abstract: An electrophotographic photosensitive member having a photosensitive layer on an electroconductive support, comprises an azo pigment represented by the general formula (1) as a charge-generating substance in the photosensitive layer ##STR1## wherein A.sub.1 and A.sub.2 are respectively an aromatic radical or an heterocyclic radical which may be linked through a linking radical; B is a radical necessary for forming together with the carbon atoms a five-membered, six-membered, or seven-membered ring which may be condensed with an aromatic ring; X is a radical condensing with the aromatic ring to form a polycyclic aromatic or heterocyclic ring; Y is oxygen, sulfur, dicyanomethylene, or cyanomethylene.Type: GrantFiled: October 18, 1989Date of Patent: September 10, 1991Assignee: Canon Kabushiki KaishaInventors: Hajime Miyazaki, Hideyuki Takai, Shintetsu Go, Kazushi Iuchi
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Patent number: 5034294Abstract: An electrophotographic photosensitive member has a photosensitive layer on an electroconductive support. The photosensitive layer comprises a compound represented by the general formula (1) or (2) having in the molecule thereof an electron-donating portion and an electron-accepting portion: ##STR1## where D is an electron-donating aromatic group or an electron-donating heterocyclic group; A is an electron-accepting aromatic group or an electron-accepting heterocyclic group; B is a hydrogen atom, or an aromatic or heterocyclic group which may form a ring together with A or D; m is an integer of 1, 2 or 3; and n is an integer of 0 or 1.Type: GrantFiled: February 7, 1990Date of Patent: July 23, 1991Assignee: Canon Kabushiki KaishaInventors: Shintetsu Go, Kazushi Iuchi, Hajime Miyazaki, Hideyuki Takai, Masakazu Matsumoto
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Patent number: 5030532Abstract: An electrostatographic imaging member comprising a support layer and at least one electrophotoconductive layer, said imaging member comprising a polyarylamine polymer represnted by the formula: ##STR1## wherein: n is between about 5 and about 5,000 or 0 if p>0,o is between about 9 and about 5,000, or is 0 if p>0 or n=0,p is between about 2 and about 100, or is 0 if n>0, X' and X" are independently selected from a group having bifunctional linkages,Q is a divalent group derived from certain hydroxy terminated arylamine reactants,Q' is a divalent group derived from a hydroxy terminated polyarylamine containing the group defined for Q and having a weight average molecular weight between about 1000 and about 80,000and the weight average molecular weight of the polyarylamine polymer is between about 10,000 and about 1,000,000.Type: GrantFiled: April 20, 1990Date of Patent: July 9, 1991Assignee: Xerox CorporationInventors: William W. Limburg, Dale S. Renfer, John F. Yanus, Jean M. Frechet, Sylvie Gauthier, Dasarao K. Murti, Giuseppa Baranyi, Zoran D. Popovic, Rafik O. Loutfy
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Patent number: 5024912Abstract: A 5H-dibenzo [a,d] cycloheptenylidene derivative and a 5H-dibenzo [1,d] cycloheptenylidene derivative represented by the following general formula [I]: ##STR1## wherein X is --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--; R.sub.1 and R.sub.2 are alkyl groups, aralkyl groups, aromatic groups or heterocyclic groups, R.sub.3 and R.sub.4 are hydrogen atoms, alkyl groups, alkoxy groups or halogen atoms; and Ar.sub.1 is an aromatic group or a heterocyclic group, process for producing those derivatives, and electrophotographic photosensitive member using the same.Type: GrantFiled: May 10, 1989Date of Patent: June 18, 1991Assignee: Canon Kabushiki KaishaInventors: Toshie Neishi, Toshihiro Kikuchi, Takao Takiguchi, Koichi Suzuki, Masakazu Matsumoto
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Patent number: 5019473Abstract: An electrophotographic recording element having a layer comprising a photoconductive perylene pigment, as a charge generation material, that is sufficiently finely and uniformly dispersed in a polymeric binder to provide the element with excellent electrophotographic speed. The perylene pigments are perylene-3,4,9,10-tetracarboxylic acid imide derivatives.Type: GrantFiled: February 23, 1990Date of Patent: May 28, 1991Assignee: Eastman Kodak CompanyInventors: Khe C. Nguyen, William T. Gruenbaum
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Patent number: 5013623Abstract: Disclosed is an electrophotographic photoreceptor which is high is sensitivity and high in endurance and which contains in photosensitive layer a novel stilbene compound represented by the following formulas [I], [II], or [III]: ##STR1##Type: GrantFiled: January 3, 1990Date of Patent: May 7, 1991Assignee: Mitsubishi Paper Mills LimitedInventors: Akira Itoh, Kozo Haino, Makoto Okaji, Kazuhiro Emoto, Tatsuya Kodera
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Patent number: 5004661Abstract: A process for the preparation of squaraines which comprises a cycloaddition, reductive alkylation and condensation reaction wherein there is reacted a nitroarylacetyl halide with a tetraalkoxy olefin, and a trialkylamine in a solvent; followed by the reaction of the resulting nitroaryl dione with hydrogen in the presence of an aldehyde and a catalyst in a solvent; and thereafter reacting the formed dialkylaminoaryl hydroxycyclobutene dione with N,N-dialkylaniline in an alcohol.Type: GrantFiled: May 30, 1989Date of Patent: April 2, 1991Assignee: Xerox CorporationInventors: Kock-Yee Law, F. Courtney Bailey
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Patent number: 4992350Abstract: An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising as an effective component at least one biphenyl compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, or an aryl group which may have a substituent, provided that at least one of R.sup.1 and R.sup.2 represents an unsubstituted or substituted aryl group. Furthermore, charge transporting materials comprising the above biphenyl compound and novel biphenyl compounds having formula (II) for use in the electrophotographic photoconductor are disclosed.Type: GrantFiled: September 19, 1989Date of Patent: February 12, 1991Assignee: Ricoh Company, Ltd.Inventors: Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada
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Patent number: 4988595Abstract: An electrophotographic imaging member containing a charge generating layer and a charge transport layer, the charge transport layer comprising a film forming binder, a first aromatic diamine represented by the general formula: ##STR1## wherein X is selected from the group consisting of an alkyl group containing from 1 to 4 carbon atoms and chlorine and a second aromatic diamine represented by the general formula: ##STR2## wherein R.sub.1 represents an alkyl group or an alkoxy group, R.sub.2 represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group and R.sub.3 represents an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group.Type: GrantFiled: December 18, 1989Date of Patent: January 29, 1991Assignee: Xerox CorporationInventors: Damodar M. Pai, John F. Yanus, Paul J. DeFeo
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Patent number: 4986921Abstract: This invention relates to a photosensitizer which is bound to a cellulose acetate polymer, a method of preparing the bound photosensitizer and a process for using the bound photosensitizer. The photosensitizers which may be used in the invention include rose bengal, rhodamine B, acridine orange, methylene blue and zinc phthalocyanine. The photosensitizer is attached to the cellulose acetate by reacting an acid group on the photosensitizer with a hydroxyl group. Finally, the bound photosensitizer may be used to oxidize undesirable oxidizable compounds present in a hydrocarbon or aqueous fraction. One specific example is the sweetening of kerosene which involves oxidizing the mercaptans contained in the kerosene.Type: GrantFiled: August 29, 1990Date of Patent: January 22, 1991Assignee: Allied-Signal Inc.Inventors: Stephen F. Yates, Mary L. Good, Inara M. Brubaker
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Patent number: 4983483Abstract: A photoreceptor comprising a conductive support, a charge generation layer coated on the conductive support and a charge transport layer coated on the charge generation layer wherein the charge generation layer comprises a polymer binder and an induced alpha-type charge generation material prepared by milling a mixture of a copper phthalocyanine pigment and a squarylium pigment.Type: GrantFiled: April 14, 1989Date of Patent: January 8, 1991Assignee: Industrial Technology Research InstituteInventor: Lii C. Tsai
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Patent number: 4975350Abstract: A photoreceptor including a carrier transporting layer containing a carrier transporting material and a binder material, and a carrier generating layer containing a carrier generating material and a binder material, the layers being placed one over the other in order of mention, characterized in that said carrier generating layer contains a metal-free phthalocyanine having main peaks of Bragg angles 2.theta. at least at 7.5 degrees.+-.0.2 degrees, 9.1 degrees .+-.0.2 degrees, 16.7 degrees.+-.0.2 degrees, 17.3 degrees.+-.0.2 degrees, and 22.3 degrees.+-.0.2 degrees in relation to CuK.alpha. characteristic X rays (wavelength 1.541 .ANG.), and in that said carrier generating layer also contains a carrier transporting material.Type: GrantFiled: August 1, 1988Date of Patent: December 4, 1990Assignee: Konica CorporationInventors: Yoshihide Fujimaki, Akira Hirano, Yasuo Suzuki
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Patent number: 4963449Abstract: There are here provided a novel tetraphenylthiophene derivative represented by the general formula ##STR1## wherein AM is a tertiary amino group, each of l, m and n is the integer 0 or 1 and l.gtoreq.m.gtoreq.n are useful as the charge-transporting material in an electrophotographic photoreceptor having an electrically conductive base and a photosensitive layer thereon containing a charge-transporting material and a charge-generating material, which preferably is an azo compound.Type: GrantFiled: November 17, 1988Date of Patent: October 16, 1990Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Hisato Itoh, Akihiro yamaguchi, Masakatsu Nakatsuka
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Patent number: 4959290Abstract: Indenylidene compounds, which are useful not only as the photoconductive material for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor in which an organic or inorganic pigment is used as a charge generating material, and an electrophotographic photoconductor containing at least one of the above indenylidene compounds in a photoconductive layer thereof, are disclosed.Type: GrantFiled: December 8, 1988Date of Patent: September 25, 1990Assignee: Ricoh Company, Ltd.Inventors: Tamotsu Aruga, Masaomi Sasaki, Mitsuru Hashimoto
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Patent number: 4956277Abstract: An electrophotographic photosensitive material includes a photosensitive layer containing a charge transporting substance comprising a novel hydrazone compound or derivative. A hydrazone compound is represented by the following general formula: ##STR1## wherein R.sub.1 stands for an aryl group which may have a substituent(s); each of R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 stands for a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group, an allyl group, an aryl group, or an aralkyl group, both of which aryl group and aralkyl group may have a substituent(s); and n stands for an integer of 0 or 1.Type: GrantFiled: December 7, 1988Date of Patent: September 11, 1990Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Youichi Nakamura, Noboru Furusho
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Patent number: 4948687Abstract: An electrophotographic photoreceptor for use in positive charging electrophotographic machines is disclosed, comprising an electrically conductive substrate having thereon a charge transporting layer, a charge generating layer, and a low resistance surface protective layer, in that order, wherein a squarylium acid derivative having an asymmetrical structure represented by the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 may be the same or different and represent a --CH.sub.3 group or a ##STR2## group (wherein Y represents a halogen atom), and X.sub.1 and X.sub.2 may be the same or different and represent a hydrogen atom, an --OH group or a halogen atom, is dispersed in said charge generating layer.Type: GrantFiled: December 30, 1988Date of Patent: August 14, 1990Assignee: Fuji Xerox Co., Ltd.Inventors: Masanori Murase, Ichiro Takegawa, Makoto Takemoto, Yasuo Sakaguchi
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Patent number: 4948689Abstract: The photoconductor for electrophotography comprises a novel amino compound as a charge transporting substance. The amino compound is represented by the following general formula: ##STR1## wherein, R.sub.1 stands for one of a hydrogen atom, a halogen atom, an alkyl group, a hydroxy group and an alkoxy group, each of R.sub.2, R.sub.3, R.sub.4 and R.sub.5 stands for one of an alkyl group, an aryl group, a thienyl group, an aralkyl group and an alkenyl group, each of which groups may be or not may be substituted and further at least one of R.sub.2 and R.sub.3 stands for thenyl group and n stands for an integer of 0, 1 or 2.Type: GrantFiled: June 20, 1989Date of Patent: August 14, 1990Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Youichi Nakamura, Noboru Furusho
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Patent number: 4945020Abstract: High resolution, photosensitive electrostatic master which is positive-working with a single imagewise exposure comprising a conductive support bearing a layer of a photosensitive composition consisting essentially of (A) at least one polymeric binder, (B) a hexaarylbiimidazole photooxidant, (C) leuco dye, preferably stabilized, oxidized by (B), (D) a nonionic halogenated compound, preferably a hydrocarbon, and (E) compatible plasticizer. A process of making positive images by a single imagewise exposure is described. The master is useful in making proofs that duplicate the image achieved by printing, etc.Type: GrantFiled: June 30, 1989Date of Patent: July 31, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventors: Richard J. Kempf, Rolf Dessauer, Steven C. Freilich
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Patent number: 4939053Abstract: The present invention relates to a photosensitive member containing a specific azo compound for a charge generating agent, which is improved in photosensitive properties, in particular, sensitivity. The specific azo compound is represented by the formula (1): ##STR1## wherein A represents an aromatic hydrocarbon or a heterocyclic ring; R.sub.1 and R.sub.2 independently represent a hydrogen, a halogen atom, or an alkyl, aralkyl, aryl, condensed polycyclic ring or condensed heterocyclic ring; or R.sub.1 and R.sub.2 combinedly form a cyclic ring; n represents an integer from 1 to 4.Type: GrantFiled: February 10, 1988Date of Patent: July 3, 1990Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 4935323Abstract: A photoconductor for electrophotography comprises a substrate and a photosensitive layer formed on the substrate and including a novel azo compound. The one type of the azo compound is represented by the following general formula. ##STR1## Wherein Cp stand for a coupler residual group and R.sub.1 stand for one of a hydrogen atom, a lower alkyl group, a lower alkoxy group and carbamoyl group.Type: GrantFiled: June 2, 1989Date of Patent: June 19, 1990Assignee: Fuji Electric Co., Ltd.Inventors: Yoshimasa Hattori, Noboru Furusho
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Patent number: 4931350Abstract: An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising at least one amino compound of the formula: ##STR1## wherein A represents a substituted or unsubstituted aromatic hydrocarbon group; R.sup.1 and R.sup.2 each represent hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; Ar represents a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted heterocyclic ring; R.sup.3 and R.sup.4 each represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, and n is an integer of 0, 1 or 2.Type: GrantFiled: October 18, 1988Date of Patent: June 5, 1990Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto
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Patent number: 4921780Abstract: An optical recording medium having a recording layer provided on a substrate, said recording layer comprising an organic thin film containing at least one diazulenium salt compound represented by the formula [I], [II] or [III], and a recording method using it.Type: GrantFiled: June 9, 1988Date of Patent: May 1, 1990Assignee: Canon Kabushiki KaishaInventors: Yoshihiro Oguchi, Tsuyoshi Santoh
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Patent number: 4920022Abstract: An electrophotographic photosensitive member comprises a conductive support and provided thereon a photosensitive layer, wherein said photosensitive layer contains an amine compound represented by the Formula (I) or Formula (II).Type: GrantFiled: May 1, 1989Date of Patent: April 24, 1990Assignee: Canon Kabushiki KaishaInventors: Teigo Sakakibara, Kiyoshi Sakai, Harumi Sakoh, Shoji Amamiya
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Patent number: 4916040Abstract: This invention relates to a photosensitive member wherein a photoconductive layer containing a N-cyanoimine compound represented by the following formula [I], [II] or [III] is formed on or over an electroconductive substrate; ##STR1## wherein R.sub.1 -R.sub.13 are respectively a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, a nitro group, a cyano group, a substituted sulfonyl group or a carboxylate group; n is an integer of 0-4; Z is a residual group which forms a ring with the benzene ring; Z may have a substituent; X is an oxygen atom or N-CN.Type: GrantFiled: August 2, 1989Date of Patent: April 10, 1990Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda