Patents by Inventor Cheng-Kuo Hsiao
Cheng-Kuo Hsiao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20060171870Abstract: A process of treating metal oxide nanoparticles that includes mixing metal oxide nanoparticles, a solvent, and a surface treatment agent that is preferably a silane or siloxane is described. The treated metal oxide nanoparticles are rendered hydrophobic by the surface treatment agent being surface attached thereto, and are preferably dispersed in a hydrophobic aromatic polymer binder of a charge transport layer of a photoreceptor, whereby ?-? interactions can be formed between the organic moieties on the surface of the nanoparticles and the aromatic components of the binder polymer to achieve a stable dispersion of the nanoparticles in the polymer that is substantially free of large sized agglomerations.Type: ApplicationFiled: April 5, 2004Publication date: August 3, 2006Applicant: XEROX CORPORATIONInventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, John Graham
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Patent number: 7081234Abstract: A process of treating metal oxide nanoparticles that includes mixing metal oxide nanoparticles, a solvent, and a surface treatment agent that is preferably a silane or siloxane is described. The treated metal oxide nanoparticles are rendered hydrophobic by the surface treatment agent being surface attached thereto, and are preferably dispersed in a hydrophobic aromatic polymer binder of a charge transport layer of a photoreceptor, whereby ?—? interactions can be formed between the organic moieties on the surface of the nanoparticles and the aromatic components of the binder polymer to achieve a stable dispersion of the nanoparticles in the polymer that is substantially free of large sized agglomerations.Type: GrantFiled: April 5, 2004Date of Patent: July 25, 2006Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, John F. Graham
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Publication number: 20060160002Abstract: A crosslinked siloxane composite overcoat for electrophotographic photoreceptors, containing at least one siloxane-containing compound, a resin and metal oxide particles; photoreceptors containing the crosslinked siloxane composite overcoat; and image process cartridge and image forming apparatuses containing photoreceptors containing the crosslinked siloxane composite overcoat.Type: ApplicationFiled: January 14, 2005Publication date: July 20, 2006Applicant: XEROX CORPORATIONInventors: Yu Qi, Nan-Xing Hu, Timothy Bender, Yvan Gagnon, John Graham, Cheng-Kuo Hsiao, Ah-Mee Hor
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Publication number: 20060154161Abstract: An aromatic silicon-containing compound has the formula: Ar—[X-L-SiRn(OR?)3-n]m where Ar represents an aromatic group, X represents a divalent or trivalent group; L represents a divalent linking group; R represents a hydrogen atom, an alkyl group or an aryl group; R? represents an alkyl group having 1 to 5 carbon atoms; n is an integer of from 0 to 2; and m is an integer of from 1 to 5. The aromatic silicon-containing compound can be used in electrophotographic photoreceptors, particularly in outmost protective layers of such electrophotographic photoreceptors.Type: ApplicationFiled: January 13, 2005Publication date: July 13, 2006Applicant: XEROX CORPORATIONInventors: Yu QI, Nan-Xing Hu, John Graham, Timothy Bender, Ah-Mee Hor, Yvan Gagnon, Cheng-Kuo Hsiao
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Publication number: 20060029872Abstract: An imaging member with a surface-grafted material having an inorganic material, a linking group, and a charge transport moiety capable of transporting holes or electrons, and the charge transport moiety is grafted to a surface of the inorganic material via the linking group, and further, an image forming apparatus having the imaging member.Type: ApplicationFiled: August 9, 2004Publication date: February 9, 2006Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Rafik Loutfy
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Publication number: 20060029803Abstract: A surface-grafted material having an inorganic material, a linking group, and a charge transport moiety capable of transporting holes or electrons, and the charge transport moiety is grafted to a surface of the inorganic material via the linking group.Type: ApplicationFiled: August 9, 2004Publication date: February 9, 2006Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Rafik Loutfy
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Publication number: 20050233231Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and thereover a charge transport layer comprised of a charge transport component or components, a polymer binder and metal oxide particles, wherein said metal oxide particles contain or are attached with or to a silane or a siloxane, or alternatively a polytetrafluoroethylene.Type: ApplicationFiled: April 14, 2004Publication date: October 20, 2005Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, John Graham, Liang-Bih Lin, Cuong Vong
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Publication number: 20050233235Abstract: A photoconductive member containing, for example, a substrate, a photogenerating layer, a charge transport layer and an overcoat layer wherein the overcoat layer is comprised of a crosslinked siloxane composite containing a caprolactone-siloxane.Type: ApplicationFiled: April 14, 2004Publication date: October 20, 2005Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Gregory McGuire, H. Goodbrand, Cuong Vong
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Patent number: 6911288Abstract: An imaging member having a substrate, a charge transport layer having charge transport materials dispersed therein, and an overcoat layer, wherein at least one of the charge transport layer and the overcoat layer comprise nano-size fillers having a particle size of from about 1 to about 250 nanometers.Type: GrantFiled: May 15, 2003Date of Patent: June 28, 2005Assignee: Xerox CorporationInventors: H. Bruce Goodbrand, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, Cuong Vong
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Publication number: 20040229141Abstract: An imaging member having a substrate, a charge transport layer having charge transport materials dispersed therein, and an overcoat layer, wherein at least one of the charge transport layer and the overcoat layer comprise nano-size fillers having a particle size of from about 1 to about 250 nanometers.Type: ApplicationFiled: May 15, 2003Publication date: November 18, 2004Applicant: Xerox CorporationInventors: H. Bruce Goodbrand, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, Cuong Vong
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Publication number: 20030013029Abstract: A process including: forming a first chlorogallium phthalocyanine (ClGaPc) in N-methyl-2-pyrrolidone (NMP) to form a ClGaPc (NMP) Type-I product; forming a second chlorogallium phthalocyanine in dimethyl sulfoxide (DMSO) to form a ClGaPc (DMSO) Type-I product; separately dry milling and then wet treating the Type-I products to form respective Type-II products; blending the Type-II products together along with a resin to form a coating mixture; and coating the mixture to form a charge generator layer in an electrostatographic imaging article.Type: ApplicationFiled: March 23, 2001Publication date: January 16, 2003Applicant: Xerox CorporationInventors: Richard A. Burt, George Liebermann, Cheng-Kuo Hsiao, Ah-Mee Hor
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Patent number: 6495300Abstract: A photoconductive imaging member containing an optional supporting substrate, a photogenerating layer, a charge transport layer, and an overcoating layer comprised of a crosslinked composite polysiloxane-silica generated from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) in the presence of silica particles and water wherein A, B, D, and F represent the segments of the polymer backbone; E is a hole transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d each represent mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to about 1; R is alkyl, substituted alkyl, aryl, or substituted aryl, and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halide, cyano, and amino, subject to the provision that two of R1, R2, and R3 are each independently selected from thType: GrantFiled: July 2, 2001Date of Patent: December 17, 2002Assignee: Xerox CorporationInventors: Yu Qi, Beng S. Ong, Cheng-Kuo Hsiao, Ping Liu, Huoy-Jen Yuh, John S. Chambers, Helen R. Cherniack
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Patent number: 6492080Abstract: A process including: forming a first chlorogallium phthalocyanine (ClGaPc) in N-methyl-2-pyrrolidone (NMP) to form a ClGaPc (NMP) Type-I product; forming a second chlorogallium phthalocyanine in dimethyl sulfoxide (DMSO) to form a ClGaPc (DMSO) Type-I product; separately dry milling and then wet treating the Type-I products to form respective Type-II products; blending the Type-II products together along with a resin to form a coating mixture; and coating the mixture to form a charge generator layer in an electrostatographic imaging article.Type: GrantFiled: March 23, 2001Date of Patent: December 10, 2002Assignee: Xerox CorporationInventors: Richard A. Burt, George Liebermann, Cheng-Kuo Hsiao, Ah-Mee Hor
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Patent number: 6444386Abstract: A photoconductive imaging member containing a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is generated from crosslinking an organosilane (I) in the presence of a hydroxy-functionalized polymer (II) for example, wherein R is alkyl or aryl, R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, halide, cyano, and amino; A and B are respectively divalent and trivalent repeating units of polymer (II); D is a divalent linkage; x and y represent the mole fractions of the repeating units of A and B, respectively, and wherein x is from about 0 to about 0.99, and y is from about 0.01 to about 1, and wherein the sum of x+y is equal to about 1.Type: GrantFiled: April 13, 2001Date of Patent: September 3, 2002Assignee: Xerox CorporationInventors: Ping Liu, Cheng-Kuo Hsiao, Beng S. Ong, Timothy J. Fuller, Huoy-Jen Yuh, Helen R. Cherniack, Markus R. Silvestri
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Patent number: 6322941Abstract: A photoconductive imaging member containing a photogenerating layer comprised of a mixture of perylenes, wherein the mixture comprises, for example, (1) 1,3-bis(n-pentylimidoperyleneimido) propane (Formula A), 1,3-bis(2-methylbutylimido peryleneimido)propane (Formula B) and 1-(n-pentylimidoperyleneimido)-3-(2-methylbutyl imidoperyleneimido)-propane (Formula C), and (2) an electron acceptor component polymerType: GrantFiled: July 13, 2000Date of Patent: November 27, 2001Assignee: Xerox CorporationInventors: Cheng-Kuo Hsiao, Ping Liu, Ah-Mee Hor, Beng S. Ong
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Patent number: 6287737Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water wherein A, B, D, and F represent the segments of the polymer backbone; E is an electron transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1; R is alkyl, substituted alkyl, aryl, or substituted aryl; and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, arylType: GrantFiled: May 30, 2000Date of Patent: September 11, 2001Assignee: Xerox CorporationInventors: Beng S. Ong, Ping Liu, Cheng-Kuo Hsiao, Huoy-Jen Yuh, John S. Chambers, Damodar M. Pai, Markus R. Silvestri, Kathleen M. Carmichael
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Patent number: 6287738Abstract: A photoconductive imaging member comprised of a mixture of at least two symmetrical perylene bisimide dimers of Formula 1 Formula 1 wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and at least one terminally unsymmetrical dimer of Formula 2 Formula 2 wherein R1 and R2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, or substituted aralkyl, and wherein R1 and R2 are dissimilar.Type: GrantFiled: May 25, 2000Date of Patent: September 11, 2001Assignee: Xerox CorporationInventors: James M. Duff, Ah-Mee Hor, C. Geoffrey Allen, Roger E. Gaynor, Cheng-Kuo Hsiao
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Patent number: 6277535Abstract: An electrophotographic imaging member includes a supporting substrate, an undercoating layer, an optional adhesive layer, a photogenerating layer, and a charge transporting layer.Type: GrantFiled: April 14, 2000Date of Patent: August 21, 2001Assignee: Xerox CorporationInventors: Ping Liu, Yu Qi, Beng S. Ong, Cheng-Kuo Hsiao, Helen R. Cherniack, Huoy-Jen Yuh
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Patent number: 6214505Abstract: A photoconductive imaging member containing a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a poly(imide-carbonate) resin binder of (I) or (II) wherein A, B and E are divalent linkages; D is a trivalent linkage in (I) and a tetravalent linkage in (II); and x and y represent mole fractions wherein the sum of x+y is equal to 1.Type: GrantFiled: July 18, 2000Date of Patent: April 10, 2001Assignee: Xerox CorporationInventors: Beng S. Ong, Yu Qi, Cheng-Kuo Hsiao
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Patent number: 6194110Abstract: A photoconductive imaging member containing a photogenerating layer comprised of a mixture of perylenes, wherein the mixture comprises, for example, (1) 1,3-bis(n-pentylimidoperyleneimido) propane (Formula A), 1,3-bis(2-methylbutylimido peryleneimido)propane (Formula B) and 1-(n-pentylimidoperyleneimido)-3-(2-methylbutylimidoperyleneimido)-propane (Formula C), and (2) an electron acceptor component Formula A 1,3-bis(n-pentylimidoperyleneimido)propane Formula B 1,3-bis(2-methylbutylimidoperyleneimido)propane Formula C 1-(n-pentylimidoperyleneimido)-3-(2-methylbutylimidoperyleneimido)propaneType: GrantFiled: July 13, 2000Date of Patent: February 27, 2001Assignee: Xerox CorporationInventors: Cheng-Kuo Hsiao, Ah-Mee Hor, Giuseppa Baranyi, H. Bruce Goodbrand