Patents by Inventor Gordon K. Hamer
Gordon K. Hamer 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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Patent number: 6656651Abstract: A component containing a supporting substrate, and thereover a layer comprised of a alkylimido-monobenzamidazole-perinone-perylene or a bisalkylimido-perinone-perylene of the alternative following formulas wherein each of R1, R2 and R3 are, for example, independently alkyl or aryl.Type: GrantFiled: May 22, 2002Date of Patent: December 2, 2003Assignee: Xerox CorporationInventors: Timothy P. Bender, James M. Duff, Cuong Vong, Gordon K. Hamer
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Patent number: 6464902Abstract: A process for the preparation of perylene mixtures comprised of at least two symmetrical perylene bisamide dimers of 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 wherein R1 and R2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, or substituted aralkyl, and wherein R1 and R2 are dissimilar, which process comprises the condensation of a mixture of at least two perylene monoimide-monoanhydrides of Formula 3 with a diamine wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, and substituted aralkyl, with a 1,3-diaminopropane.Type: GrantFiled: May 25, 2000Date of Patent: October 15, 2002Assignee: Xerox CorporationInventors: Roger E. Gaynor, James M. Duff, C. Geoffrey Allen, Gordon K. Hamer, Ah-Mee Hor
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Patent number: 6320007Abstract: A free radical polymerization process for the preparation of a thermoplastic resin or resins includes the in situ formation of a stable free radical agent from a precursor material in a reactor vessel, introducing a free radical initiator and at least one polymerizable monomer compound into the reactor vessel, and heating a mixture of the free radical initiator, the stable free radical agent, and the polymerizable monomer compound(s) in the reactor vessel to form a thermoplastic resin.Type: GrantFiled: November 18, 1994Date of Patent: November 20, 2001Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Michael K. Georges, Richard P. N. Veregin, Barkev Keoshkerian, Gordon K. Hamer, Karen A. Moffat, Marko Saban
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Patent number: 6258911Abstract: A polymer having groups located at the ends of the polymer chain which groups are derived from stable free radical compounds, wherein the polymer is of the formula: SFR—(R)—SFR wherein SFR represents a covalently bonded stable free radical group and R represents a thermoplastic resin.Type: GrantFiled: August 18, 1994Date of Patent: July 10, 2001Assignee: Xerox CorporationInventors: Michael K. Georges, Toyofumi Inoue, Gordon K. Hamer, Peter M. Kazmaier, Richard P. N. Veregin
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Patent number: 6114499Abstract: A process for the preparation of branched thermoplastic resins comprising: heating a mixture of an unsaturated resin, a free radical initiator, and a stable free radical agent; adding to the heated mixture at least on polymerizable monomer; and cooling the mixture, wherein the resulting product is a branched thermoplastic resin with arms or branches comprised of polymerized monomer with substantially uniform length and narrow polydispersity.Type: GrantFiled: April 21, 1999Date of Patent: September 5, 2000Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer, Toyofumi Inoue, Stephan V. Drappel
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Patent number: 6096464Abstract: A photoreceptor including: (a) a substrate; (b) a charge generating layer; and (c) a charge transport layer including a charge transport material and a rotaxane material.Type: GrantFiled: January 27, 2000Date of Patent: August 1, 2000Assignee: Xerox CorporationInventors: Pudupadi R. Sundararajan, Dasarao K. Murti, Peter G. Odell, Gordon K. Hamer
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Patent number: 6087451Abstract: A polymer having groups located at the ends of the polymer chain which groups are derived from stable free radical compounds, wherein the polymer is of the formula:SFR-(R)-SFRwherein SFR represents a covalently bonded stable free radical group and R represents a thermoplastic resin.Type: GrantFiled: May 1, 1998Date of Patent: July 11, 2000Assignee: Xerox CorporationInventors: Michael K. Georges, Toyofumi Inoue, Gordon K. Hamer, Peter M. Kazmaier, Richard P. N. Veregin
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Patent number: 6075105Abstract: A process for the preparation of resin particles comprising: heating a mixture comprised of a free radical initiator compound, at least one stable free radical compound, at least one free radical polymerizable monomer compound, and at least one free radical polymerizable crosslinking compound; and cooling the mixture, wherein the resulting product resin particles are crosslinked and are comprised of polymerized monomers and at least one crosslinking compound, and wherein the particles have a narrow particle size distribution, a narrow pore size distribution, and a high monomer to polymer conversion.Type: GrantFiled: August 26, 1996Date of Patent: June 13, 2000Assignee: Xerox CorporationInventors: Barkev Keoshkerian, Michael K. Georges, Peter M. Kazmaier, Gordon K. Hamer
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Patent number: 5952402Abstract: An ink composition comprised of a colorant and a phase change vehicle derived from the reaction product of a resin containing at least one furan moiety and at least one maleimide moiety, and wherein said ink possesses a viscosity of from about 1 centipoise to about 20 centipoise at a temperature of from about 100.degree. C. to about 180.degree. C.Type: GrantFiled: August 21, 1998Date of Patent: September 14, 1999Assignee: Xerox CorporationInventors: Anthony J. Paine, Gordon K. Hamer, Carl P. Tripp, James P. Bareman, Fatima M. Mayer, Guerino G. Sacripante
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Patent number: 5919861Abstract: A process for the preparation of branched thermoplastic resins comprising: heating a mixture of an unsaturated resin, a free radical initiator, and a stable free radical agent; adding to the heated mixture at least on polymerizable monomer; and cooling the mixture, wherein the resulting product is a branched thermoplastic resin with arms or branches comprised of polymerized monomer with substantially uniform length and narrow polydispersity.Type: GrantFiled: July 16, 1997Date of Patent: July 6, 1999Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer
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Patent number: 5844020Abstract: An ink composition comprised of a colorant and a phase change vehicle derived from the reaction product of a resin containing at least one furan moiety and at least one maleimide moiety, and wherein said ink possesses a viscosity of from about 1 centipoise to about 20 centipoise at a temperature of from about 100.degree. C. to about 180.degree. C.Type: GrantFiled: March 31, 1997Date of Patent: December 1, 1998Assignee: Xerox CorporationInventors: Anthony J. Paine, Gordon K. Hamer, Carl P. Tripp, James P. Bareman, Fatima M. Mayer, Guerino G. Sacripante
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Patent number: 5773510Abstract: A process for the preparation of branched thermoplastic resins comprising: heating a mixture of an unsaturated resin, a free radical initiator, and a stable free radical agent; adding to the heated mixture at least on polymerizable monomer; and cooling the mixture, wherein the resulting product is a branched thermoplastic resin with arms or branches comprised of polymerized monomer with substantially uniform length and narrow polydispersity.Type: GrantFiled: March 30, 1995Date of Patent: June 30, 1998Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer, Toyofumi Inoue, Stephan V. Drappel
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Patent number: 5760124Abstract: An aqueous ink jet ink composition comprising pigment, water, and an (A.sub.n -B.sub.m) block copolymer wherein n represents the degree of polymerization of A and m represents the degree of polymerization of B, wherein A is styrene, and B is acrylic acid.Type: GrantFiled: June 17, 1996Date of Patent: June 2, 1998Assignee: Xerox CorporationInventors: Nancy A. Listigovers, Fatima M. Pontes, Marcel P. Breton, Gordon K. Hamer
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Patent number: 5756744Abstract: Photoconductive imaging members comprised of unsymmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formula ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl group, and X--Y is an unsymmetrical bridging moiety of alkylene, substituted alkylene, arylene, substituted arylene, aralkylene or substituted aralkylene.Type: GrantFiled: July 29, 1997Date of Patent: May 26, 1998Assignee: Xerox CorporationInventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
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Patent number: 5739229Abstract: A process for the preparation of thermoplastic resin comprising: heating a mixture comprised of a free radical initiator, a stable free radical agent, at least one polymerizable monomer compound and an electron acceptor (EA) compound, to form a thermoplastic resin containing a homopolymeric segment or segments and wherein said process possesses a high monomer to polymer conversion and a narrow polydispersity.Type: GrantFiled: November 7, 1995Date of Patent: April 14, 1998Assignee: Xerox CorporationInventors: Barkev Keoshkerian, Michael K. Georges, Peter M. Kazmaier, Gordon K. Hamer
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Patent number: 5728747Abstract: A free radical polymerization process for the preparation of polymer comprising:a first heating and photoinitiating with ultraviolet light of a mixture comprised of a stable free radical agent, and at least one polymerizable monomer compound;optionally cooling said mixture;a second heating of said mixture at a temperature of from about 100.degree. C. to about 160.degree. C.;isolating the polymer product formed; andoptionally washing and drying said polymer.Type: GrantFiled: August 8, 1996Date of Patent: March 17, 1998Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Barkev Keoshkerian, Rafik O. Loutfy, Karen A. Moffat, Michael K. Georges, Gordon K. Hamer, Richard P. N. Veregin
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Patent number: 5723511Abstract: A process for the preparation of branched thermoplastic resins comprising: heating a mixture of a free radical initiator, at least one first free radical reactive monomer, at least one free radical reactive branching agent compound, and at least one stable free radical agent, to produce a linear or unbranched polymer product with a free radical initator fragment at one end and a covalently bonded stable free radical agent at the other end of the polymerized chain of monomers; and irradiating the unbranched polymer product in the presence of a reactive compound selected from the group consisting of a free radical reactive monomer, a branching agent compound, and mixtures thereof to form a branched polymeric product.Type: GrantFiled: June 17, 1996Date of Patent: March 3, 1998Assignee: Xerox CorporationInventors: Peter M. Kazmaier, Barkev Keoshkerian, Karen A. Moffat, Michael K. Georges, Gordon K. Hamer, Richard P. N. Veregin
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Patent number: 5683842Abstract: Photoconductive imaging members comprised of unsymmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formula ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl group, and X-Y is an unsymmetrical bridging moiety of alkylene, substituted alkylene, arylene, substituted arylene, aralkylene or substituted aralkylene.Type: GrantFiled: February 26, 1997Date of Patent: November 4, 1997Assignee: Xerox CorporationInventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
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Patent number: 5645965Abstract: Photoconductive imaging members comprised of a symmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formulawherein R is hydrogen, alkyl, cycloalkyl, oxaalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and X is the symmetrical bridging moiety, N--N, alkylene, when n is zero, substituted alkylene, cycloalkylene, arylene, substituted arylene, aralkylene, or substituted aralkylene.Type: GrantFiled: August 8, 1996Date of Patent: July 8, 1997Assignee: Xerox CorporationInventors: James M. Duff, Charles G. Allen, Ah-Mee Hor, Gordon K. Hamer
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Patent number: 5626654Abstract: Disclosed is an ink composition which comprises an aqueous liquid vehicle, a dye, and a vesicle-forming lipid, wherein vesicles of the lipid are present in the ink.Type: GrantFiled: December 5, 1995Date of Patent: May 6, 1997Assignee: Xerox CorporationInventors: Marcel P. Breton, Jaan Noolandi, MaryAnna Isabella, Susanne Birkel, Gordon K. Hamer