Patents by Inventor James M. Duff

James M. Duff 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: 6696552
    Abstract: A process which comprises admixing in the absence of a solvent an amine of the formula R1—NH2 and a first ester of the formula wherein R2 is an electron withdrawing group and R3 is an alkyl group; heating the mixture containing the amine and the first ester to form an intermediate compound of the formula admixing the intermediate compound with a base and a second ester of the formula said second ester being present in a molar excess relative to the intermediate compound, said base being present in a molar excess relative to the intermediate compound, and heating the mixture to form a pyridone compound of the formula or a salt thereof. Also disclosed is a process for preparing diazopyridone colorants which comprises preparing a pyridone compound by the above process and reacting the pyridone compound with a diazonium salt to form a diazopyridone compound.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: February 24, 2004
    Assignee: Xerox Corporation
    Inventors: James D. Mayo, James M. Duff, Rina Carlini, Roger E. Gaynor, George Liebermann
  • Publication number: 20040018440
    Abstract: A member including for example, a supporting layer and a single photogenerating layer, the photogenerating layer comprising particles including hydroxygallium phthalocyanine phthalocyanine Type V, x polymorph metal free phthalocyanine, or chlorogallium phthalocyanine dispersed in a matrix comprising an arylamine hole transporter and an electron transporter selected from the group consisting of N,N′bis(1,2-dimethylpropyl)-1,4,5,8-naphthalenetetracarboxylic diimide, 1,1′-dioxo-2-(4-methylphenyl)-6-phenyl-4-(dicyanomethylidene)thiopyran, and a quinone selected from the group consisting of carboxybenzylhaphthaquinone, and tetra (t-butyl) diphenoquinone, and mixtures thereof, and a film forming binder.
    Type: Application
    Filed: July 23, 2002
    Publication date: January 29, 2004
    Applicant: Xerox Corporation
    Inventors: Liang-Bih Lin, Cindy C. Chen, James M. Duff, Timothy P. Bender, Harold F. Hammond, James M. Markovics, Linda L. Ferrarese, John S. Chambers, Anna M. Main
  • Publication number: 20040013959
    Abstract: A compound having the Formula I 1
    Type: Application
    Filed: July 17, 2002
    Publication date: January 22, 2004
    Applicant: Xerox Corporation
    Inventors: Timothy P. Bender, John F. Graham, James M. Duff
  • Publication number: 20040007155
    Abstract: Disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound of the formula 1
    Type: Application
    Filed: June 27, 2002
    Publication date: January 15, 2004
    Applicant: Xerox Corporation
    Inventors: Jeffrey H. Banning, Bo Wu, James D. Mayo, James M. Duff, Rina Carlini, Jule W. Thomas,, Paul F. Smith
  • Publication number: 20040009418
    Abstract: A member including for example, a substrate, a charge blocking layer, an optional adhesive layer, a charge generating layer comprising particles comprising a photogenerating layer of for example, chlorogallium phthalocyanine dispersed in a matrix comprising a charge transport molecule, an electron transport molecule which functions to sensitize the chlorogallium phthalocyanine pigment in the charge generating layer and mixtures thereof, and a film forming binder.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 15, 2004
    Applicant: Xerox Corporation.
    Inventors: Anna M. Main, Liang-Bih Lin, John S. Chambers, James M. Duff, Timothy P. Bender
  • Publication number: 20040010058
    Abstract: Disclosed are compounds of the formula 1
    Type: Application
    Filed: June 27, 2002
    Publication date: January 15, 2004
    Applicant: Xerox Corporation
    Inventors: Rina Carlini, Jeffrey H. Banning, James M. Duff, Bo Wu, James D. Mayo
  • Publication number: 20040006234
    Abstract: Disclosed is a process for preparing substituted pyridone compounds which comprises (a) admixing in the absence of a solvent (1) an amine of the formula R1—NH2 wherein R1 is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and (2) a first ester of the formula 1
    Type: Application
    Filed: June 27, 2002
    Publication date: January 8, 2004
    Applicant: Xerox Corporation
    Inventors: James D. Mayo, James M. Duff, Rina Carlini, Roger E. Gaynor, George Liebermann
  • Patent number: 6673139
    Abstract: Disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound of the formula
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: January 6, 2004
    Assignee: Xerox Corporation
    Inventors: Bo Wu, Rina Carlini, James M. Duff, Jeffrey H. Banning, James D. Mayo
  • Patent number: 6663703
    Abstract: Disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound of the formula
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: December 16, 2003
    Assignee: Xerox Corporation
    Inventors: Bo Wu, Rina Carlini, Jeffrey H. Banning, James M. Duff, James D. Mayo, Jule W. Thomas, Jr., Paul F. Smith, Michael B. Meinhardt
  • Publication number: 20030228718
    Abstract: A field effect transistor composed of:
    Type: Application
    Filed: March 25, 2003
    Publication date: December 11, 2003
    Applicant: Xerox Corporation
    Inventors: Dasarao K. Murti, Beng S. Ong, James M. Duff
  • Publication number: 20030227014
    Abstract: A process comprising:
    Type: Application
    Filed: June 11, 2002
    Publication date: December 11, 2003
    Applicant: Xerox Corporation.
    Inventors: Dasarao K. Murti, Beng S. Ong, James M. Duff
  • 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: 6656650
    Abstract: A member including, for example, a supporting layer and a single photogenerating layer, the photogenerating layer comprising particles including hydroxygallium phthalocyanine phthalocyanine Type V, x polymorph metal free phthalocyanine, or chlorogallium phthalocyanine dispersed in a matrix comprising an arylamine hole transporter and an electron transporter selected from the group consisting of N,N′bis(1,2-dimethylpropyl)-1,4,5,8-naphthalenetetracarboxylic diimide, 1,1′-dioxo-2-(4-methylphenyl)-6-phenyl-4-(dicyanomethylidene)thiopyran, and a quinone selected from the group consisting of carboxybenzylhaphthaquinone, and tetra (t-butyl) diphenoquinone, and mixtures thereof, and submicrometer size polytetrafluroethylene particles, and a film forming binder.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: December 2, 2003
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, Helen R. Cherniack, John S. Chambers, Anna M. Main, Huoy-Jen Yuh, Cindy C. Chen, James M. Duff, Timothy P. Bender
  • Publication number: 20030215727
    Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer and a charge transport layer, and wherein said charge transport layer contains a component that substantially prevents light of a wavelength of about equal to or about less than 700 nanometers from interaction with said photogenerating layer.
    Type: Application
    Filed: May 17, 2002
    Publication date: November 20, 2003
    Applicant: Xerox Corporation
    Inventors: John F. Graham, Zoran D. Popovic, Ah-Mee Hor, James M. Duff, Satchidanand Mishra
  • Publication number: 20030211413
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder, and wherein the photogenerating component is a pigment.
    Type: Application
    Filed: May 10, 2002
    Publication date: November 13, 2003
    Applicant: Xerox Corporation.
    Inventors: Liang-Bin Lin, Andronique Ioannidis, Ah-Mee Hor, Harold F. Hammond, Anderw R. Melnyk, James M. Markovics, James M. Duff, Timothy P. Bender, Richard H. Nealey, Cindy C. Chen, Linda L. Ferrarese, Kenny-Tuan T. Dinh
  • Patent number: 6646111
    Abstract: Disclosed are compounds of the formula The compounds are useful as colorants, particularly in applications such as phase change inks.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: November 11, 2003
    Assignee: Xerox Corporation
    Inventors: Rina Carlini, James M. Duff, Jeffrey H. Banning, Bo Wu, James D. Mayo
  • Publication number: 20030172841
    Abstract: Disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound of the formula 1
    Type: Application
    Filed: February 8, 2002
    Publication date: September 18, 2003
    Applicant: Xerox Corporation
    Inventors: Donald R. Titterington, Michael B. Meinhardt, Jeffrey H. Banning, James D. Mayo, James M. Duff, Roger E. Gaynor, Harold R. Frame
  • Patent number: 6590082
    Abstract: Disclosed are compounds of the formula The compounds are useful as colorants, particularly in applications such as phase change inks.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: July 8, 2003
    Assignee: Xerox Corporation
    Inventors: Jeffrey H. Banning, Rina Carlini, James D. Mayo, James M. Duff, C. Wayne Jaeger
  • Patent number: 6576748
    Abstract: Disclosed is a process for preparing a diazopyridone compound either (A) of the formula or (B) of the formula which comprises diazotizing a dianiline and coupling it with a pyridone or diazotizing an aniline and coupling it with a dipyridone.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: June 10, 2003
    Assignee: Xerox Corporation
    Inventors: Rina Carlini, James D. Mayo, James M. Duff, Jeffrey H. Banning, Paul F. Smith, George Liebermann, Roger E. Gaynor
  • Patent number: 6576747
    Abstract: Disclosed is a process for preparing dianthranilate compounds which comprises (a) admixing reactants as follows: (1) a diol of the formula R1(OH)2, wherein R1 is an alkylene group having at least about 20 carbon atoms, and wherein the —OH groups are primary or secondary, (2) isatoic anhydride, present in an amount of at least, about 2 moles of isatoic anhydride per every one mole of diol, (3) a catalyst which is 1,4-diazabicyclo [2.2.2]octane, N,N,N′,N′-tetramethylethylene diamine, or a mixture thereof, said catalyst being present in an amount of at least about 0.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: June 10, 2003
    Assignee: Xerox Corporation
    Inventors: Rina Carlini, James M. Duff, Stephen G. Robinson, George Liebermann, Roger E. Gaynor, Tania Pereira, Jeffrey H. Banning, James D. Mayo