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: 8202674
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: June 19, 2012
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Publication number: 20110028724
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Application
    Filed: October 11, 2010
    Publication date: February 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Patent number: 7820780
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: October 26, 2010
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Patent number: 7754862
    Abstract: Disclosed is a compound comprising three or more moieties of the formula said moieties being bonded to a central atom, monomeric group of atoms, oligomer, or polymer. Also disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound comprising three or more moieties of the formula said moieties being bonded to a central atom, monomeric group of atoms, oligomer, or polymer.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: July 13, 2010
    Assignee: Xerox Corporation
    Inventors: James D Mayo, James M Duff
  • Publication number: 20090234092
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Application
    Filed: June 5, 2009
    Publication date: September 17, 2009
    Applicant: Xerox Corporation
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Patent number: 7544450
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: June 9, 2009
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Patent number: 7449268
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: November 11, 2008
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Publication number: 20080171275
    Abstract: Polymers of naphthalene tetracarboxylic diimide dimmers are provided. The polymers are of the Formula I wherein the A units are selected from and Formula IX The polymers are suitable for use in the active layer of an imaging member and exhibit properties of both a binder and an electron-transporting material.
    Type: Application
    Filed: March 19, 2008
    Publication date: July 17, 2008
    Applicant: XEROX CORPORATION
    Inventors: Timothy P. Bender, John Graham, James M. Duff
  • Patent number: 7381253
    Abstract: Disclosed is a compound comprising three or more moieties of the formula said moieties being bonded to a central atom, monomeric group of atoms, oligomer, or polymer. Also disclosed is a phase change ink composition comprising a phase change ink carrier and a colorant compound comprising three or more moieties of the formula said moieties being bonded to a central atom, monomeric group of atoms, oligomer, or polymer.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: June 3, 2008
    Assignee: Xerox Corporation
    Inventors: James D. Mayo, James M. Duff
  • Patent number: 7354685
    Abstract: A photoconductive member comprised of a hole blocking layer, a photogenerating layer, and a charge transport layer comprised of a polymer with a low dielectric constant and a charge transport component.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: April 8, 2008
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-Bih Lin, James M. Duff, Timothy P. Bender
  • Patent number: 7301025
    Abstract: Compounds of the formula wherein M is either (1) a metal ion having a positive charge of +p wherein p is an integer which is at least 2, said metal ion being capable of forming a compound with at least two chromogen moieties, or (2) a metal-containing moiety capable of forming a compound with at least two chromogen moieties, z is an integer representing the number of chromogen moieties associated with the metal and is at least 2, and R1, R2, R3, R4, R5, R6, R7, a, b, c, d, Y, Q?, A, and CA are as defined herein.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: November 27, 2007
    Assignee: Xerox Corporation
    Inventors: Jeffery H. Banning, Bo Wu, James M. Duff, Wolfgang G. Wedler, Jule W. Thomas, Jr., Randall R. Bridgeman
  • Patent number: 7297458
    Abstract: A photoconductive member containing a supporting substrate, a photogenerating layer, and a charge transport layer and wherein the photogenerating layer comprises a photogenerating component, and an electron transport component.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: November 20, 2007
    Assignee: Xerox Corporation
    Inventors: Nancy L. Belknap, Andronique Ioannidis, Cindy C. Chen, Lanhui Zhang, James M. Duff, John F. Graham, Timothy P. Bender
  • Patent number: 7291430
    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: Grant
    Filed: July 2, 2002
    Date of Patent: November 6, 2007
    Assignee: Xerox Corporation
    Inventors: Anna M. Main, Liang-Bih Lin, John S. Chambers, James M. Duff, Timothy P. Bender
  • Patent number: 7223507
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, charge transport components, and a certain electron transport component, and a certain polymer binder.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: May 29, 2007
    Assignee: Xerox Corporation
    Inventors: Andronique Ioannidis, Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Timothy P. Bender, John F. Graham, Ah-Mee Hor, James M. Duff
  • Patent number: 7176317
    Abstract: Compounds of the formula wherein R1, R2, R3, R4, R5, R6, R7, a, b, c, d, Y, Q, Q—, A, and CA are as defined herein.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: February 13, 2007
    Assignee: Xerox Corporation
    Inventors: Jeffery H. Banning, Bo Wu, James M. Duff, Wolfgang G. Wedler, Donald R. Titterington
  • Patent number: 7115345
    Abstract: According to the present invention is an electrophotographic imaging member which is a thin dual layer structure comprising a top layer of a durable and wear-resistant layer and a bottom layer which is bipolar. The electrophotographic imaging member of the invention may be top surface charge generating or bottom surface charge generating and in either case has an overall negative charging mode of operation.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: October 3, 2006
    Assignee: Xerox Corporation
    Inventors: Andronique Ioannidis, Timothy J. Fuller, Nancy L. Belknap, Markus R. Silvestri, Cindy C. Chen, Timothy P. Bender, John F. Graham, James M. Duff, Kenny-Tuan T. Dinh, John F. Yanus, James M. Markovics, Lanhui Zhang
  • Patent number: 7070892
    Abstract: A photoconductive imaging member containing a supporting substrate, and thereover a single layer comprised of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: July 4, 2006
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, John F. Graham, James M. Duff, Andronique Ioannidis, Nancy L. Belknap
  • Patent number: 7037630
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single photoactive layer comprised of a mixture of a photogenerator component, an electron transport component, a transport component, and a polymeric binder; and wherein said photogenerating component is comprised of a mixture of a metal free phthalocyanine and a hydroxygallium phthalocyanine.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: May 2, 2006
    Assignee: Xerox Corporation
    Inventors: Cuong Vong, John F. Graham, Ah-Mee Hor, James M. Duff
  • Patent number: 7011916
    Abstract: A compound having the Formula I wherein: R1 is independently selected from the group consisting of a straight chain alkyl group, a branched alkyl group, a cycloalkyl group, an alkoxy group, a monocyclic aromatic group, a polycyclic aromatic group, an alkylaryl group, or an arylalkyl group; R2 and R3 are independently selected from the group consisting of a straight chain alkyl group, a branched alkyl group, a cycloalkyl group, an alkoxy group, a monocyclic aromatic group, a polycyclic aromatic group, a heterocyclic group, an alkylaryl group, an arylalkyl group, an alkoxyaryl group, an arylalkoxy group, a halogen, and hydrogen; R4, R5, R6, R7, R8, R9, R10 and R11 are independently selected from the group consisting of a straight chain alkyl group, a branched alkyl group, a cycloalkyl group, an alkoxy group, a monocyclic aromatic group, a polycyclic aromatic group, an alkylaryl group, an arylalkyl group, an alkoxyaryl group, an arylalkoxy group, an aryloxy group, a halogen, and hydrogen.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: March 14, 2006
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, John F. Graham, James M. Duff
  • Patent number: 6998493
    Abstract: Compounds of the formula wherein M is either (1) a metal ion having a positive charge of +p wherein p is an integer which is at least 2, said metal ion being capable of forming a compound with at least two chromogen moieties, or (2) a metal-containing moiety capable of forming a compound with at least two chromogen moieties, z is an integer representing the number of chromogen moieties associated with the metal and is at least 2, and R1, R2, R3, R4, R5, R6, R7, a, b, c, d, Y, Q?, A, and CA are as defined herein.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: February 14, 2006
    Assignee: Xerox Corporation
    Inventors: Jeffery H. Banning, Bo Wu, James M. Duff, Wolfgang G. Wedler, Jule W. Thomas, Jr., Randall R. Bridgeman