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).

  • Patent number: 6656651
    Abstract: 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: Grant
    Filed: May 22, 2002
    Date of Patent: December 2, 2003
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, James M. Duff, Cuong Vong, Gordon K. Hamer
  • Patent number: 6464902
    Abstract: 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: Grant
    Filed: May 25, 2000
    Date of Patent: October 15, 2002
    Assignee: Xerox Corporation
    Inventors: Roger E. Gaynor, James M. Duff, C. Geoffrey Allen, Gordon K. Hamer, Ah-Mee Hor
  • Patent number: 6320007
    Abstract: 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: Grant
    Filed: November 18, 1994
    Date of Patent: November 20, 2001
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Michael K. Georges, Richard P. N. Veregin, Barkev Keoshkerian, Gordon K. Hamer, Karen A. Moffat, Marko Saban
  • Patent number: 6258911
    Abstract: 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: Grant
    Filed: August 18, 1994
    Date of Patent: July 10, 2001
    Assignee: Xerox Corporation
    Inventors: Michael K. Georges, Toyofumi Inoue, Gordon K. Hamer, Peter M. Kazmaier, Richard P. N. Veregin
  • Patent number: 6114499
    Abstract: 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: Grant
    Filed: April 21, 1999
    Date of Patent: September 5, 2000
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer, Toyofumi Inoue, Stephan V. Drappel
  • Patent number: 6096464
    Abstract: 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: Grant
    Filed: January 27, 2000
    Date of Patent: August 1, 2000
    Assignee: Xerox Corporation
    Inventors: Pudupadi R. Sundararajan, Dasarao K. Murti, Peter G. Odell, Gordon K. Hamer
  • Patent number: 6087451
    Abstract: 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: Grant
    Filed: May 1, 1998
    Date of Patent: July 11, 2000
    Assignee: Xerox Corporation
    Inventors: Michael K. Georges, Toyofumi Inoue, Gordon K. Hamer, Peter M. Kazmaier, Richard P. N. Veregin
  • Patent number: 6075105
    Abstract: 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: Grant
    Filed: August 26, 1996
    Date of Patent: June 13, 2000
    Assignee: Xerox Corporation
    Inventors: Barkev Keoshkerian, Michael K. Georges, Peter M. Kazmaier, Gordon K. Hamer
  • Patent number: 5952402
    Abstract: 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: Grant
    Filed: August 21, 1998
    Date of Patent: September 14, 1999
    Assignee: Xerox Corporation
    Inventors: Anthony J. Paine, Gordon K. Hamer, Carl P. Tripp, James P. Bareman, Fatima M. Mayer, Guerino G. Sacripante
  • Patent number: 5919861
    Abstract: 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: Grant
    Filed: July 16, 1997
    Date of Patent: July 6, 1999
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer
  • Patent number: 5844020
    Abstract: 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: Grant
    Filed: March 31, 1997
    Date of Patent: December 1, 1998
    Assignee: Xerox Corporation
    Inventors: Anthony J. Paine, Gordon K. Hamer, Carl P. Tripp, James P. Bareman, Fatima M. Mayer, Guerino G. Sacripante
  • Patent number: 5773510
    Abstract: 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: Grant
    Filed: March 30, 1995
    Date of Patent: June 30, 1998
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Karen A. Moffat, Marko D. Saban, Richard P. N. Veregin, Michael K. Georges, Gordon K. Hamer, Toyofumi Inoue, Stephan V. Drappel
  • Patent number: 5760124
    Abstract: 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: Grant
    Filed: June 17, 1996
    Date of Patent: June 2, 1998
    Assignee: Xerox Corporation
    Inventors: Nancy A. Listigovers, Fatima M. Pontes, Marcel P. Breton, Gordon K. Hamer
  • Patent number: 5756744
    Abstract: 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: Grant
    Filed: July 29, 1997
    Date of Patent: May 26, 1998
    Assignee: Xerox Corporation
    Inventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
  • Patent number: 5739229
    Abstract: 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: Grant
    Filed: November 7, 1995
    Date of Patent: April 14, 1998
    Assignee: Xerox Corporation
    Inventors: Barkev Keoshkerian, Michael K. Georges, Peter M. Kazmaier, Gordon K. Hamer
  • Patent number: 5728747
    Abstract: 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: Grant
    Filed: August 8, 1996
    Date of Patent: March 17, 1998
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Barkev Keoshkerian, Rafik O. Loutfy, Karen A. Moffat, Michael K. Georges, Gordon K. Hamer, Richard P. N. Veregin
  • Patent number: 5723511
    Abstract: 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: Grant
    Filed: June 17, 1996
    Date of Patent: March 3, 1998
    Assignee: Xerox Corporation
    Inventors: Peter M. Kazmaier, Barkev Keoshkerian, Karen A. Moffat, Michael K. Georges, Gordon K. Hamer, Richard P. N. Veregin
  • Patent number: 5683842
    Abstract: 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: Grant
    Filed: February 26, 1997
    Date of Patent: November 4, 1997
    Assignee: Xerox Corporation
    Inventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
  • Patent number: 5645965
    Abstract: 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: Grant
    Filed: August 8, 1996
    Date of Patent: July 8, 1997
    Assignee: Xerox Corporation
    Inventors: James M. Duff, Charles G. Allen, Ah-Mee Hor, Gordon K. Hamer
  • Patent number: 5626654
    Abstract: 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: Grant
    Filed: December 5, 1995
    Date of Patent: May 6, 1997
    Assignee: Xerox Corporation
    Inventors: Marcel P. Breton, Jaan Noolandi, MaryAnna Isabella, Susanne Birkel, Gordon K. Hamer