Patents by Inventor Dasarao K. Murti

Dasarao K. Murti 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: 8486304
    Abstract: A composition including a polymer and a liquid, wherein the polymer exhibits lower solubility in the liquid at room temperature but exhibits greater solubility in the liquid at an elevated temperature, wherein the composition gels when the elevated temperature is lowered to a first lower temperature without agitation, wherein the viscosity of the composition results from a process comprising (a) dissolving at the elevated temperature at least a portion of the polymer in the liquid; (b) lowering the temperature of the composition from the elevated temperature to the first lower temperature; and (c) agitating the composition to disrupt any gelling, wherein the agitating commences at any time prior to, simultaneous with, or subsequent to the lowering the elevated temperature of the composition to the first lower temperature, wherein the amount of the polymer dissolved in the liquid at the elevated temperature ranges from about 0.2% to about 5% based on the total weight of the polymer and the liquid.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: July 16, 2013
    Inventors: Yiliang Wu, Ping Liu, Beng S. Ong, Dasarao K. Murti
  • Patent number: 7291428
    Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: November 6, 2007
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
  • Patent number: 7166397
    Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: January 23, 2007
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
  • Patent number: 7005672
    Abstract: A thin film transistor including: an insulating layer; a gate electrode; a semiconductor layer including coalesced structurally ordered polymer aggregates of a self-organizable polymer, wherein the self-organizable polymer is of a type capable of gelling; a source electrode; and a drain electrode, wherein the insulating layer, the gate electrode, the semiconductor layer, the source electrode, and the drain electrode are in any sequence as long as the gate electrode and the semiconductor layer both contact the insulating layer, and the source electrode and the drain electrode both contact the semiconductor layer.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: February 28, 2006
    Assignee: Xerox Corporation
    Inventors: Yiliang Wu, Ping Liu, Beng S. Ong, Dasarao K. Murti
  • Patent number: 6992167
    Abstract: Polythiophenes of the formula wherein R and R? are side chains; A is a divalent linkage; x and y represent the number of unsubstituted thienylene units; z represents the number of groups, and wherein the sum of x and y represents the number of groups; m represents the number of segments; and n represents the degree of polymerization.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: January 31, 2006
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Patent number: 6890868
    Abstract: A process including: (a) selecting a composition including a polymer and a liquid, wherein the polymer exhibits lower solubility in the liquid at room temperature but exhibits greater solubility in the liquid at an elevated temperature, wherein the composition gels when the elevated temperature is lowered to a first lower temperature without agitation; (b) dissolving at the elevated temperature at least a portion of the polymer in the liquid; (c) lowering the temperature of the composition from the elevated temperature to the first lower temperature; (d) agitating the composition to disrupt any gelling, wherein the agitating commences at any time prior to, simultaneous with, or subsequent to the lowering the elevated temperature of the composition to the first lower temperature: (e) depositing a layer of the composition wherein the composition is at a second lower temperature lower than the elevated temperature; and (f) drying at least partially the layer.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: May 10, 2005
    Assignee: Xerox Corporation
    Inventors: Yiliang Wu, Ping Liu, Beng S. Ong, Dasarao K. Murti
  • Patent number: 6861664
    Abstract: An electronic device includes a semiconductor layer in contact with a number of electrodes, wherein the semiconductive layer includes a compound wherein either or both of the following geometric isomers of the compound are present: wherein: n is 1, 2 or 3 for the polycyclic moiety; and R1 and R2 are independently selected from the group consisting of a hydrocarbon ring and a heterocyclic group, wherein R1 and R2 are the same or different hydrocarbon ring, the same or different heterocyclic group, or one of R1 and R2 is the hydrocarbon ring and the other the heterocyclic group.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: March 1, 2005
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Dasarao K. Murti, James M. Duff, Yiliang Wu
  • Publication number: 20040236070
    Abstract: Polythiophenes of the formula 1
    Type: Application
    Filed: June 23, 2004
    Publication date: November 25, 2004
    Applicant: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Patent number: 6777529
    Abstract: Polythiophenes of the formula wherein R and R′ are side chains; A is a divalent linkage; x and y represent the number of unsubstituted thienylene units; z is 0 or 1, and wherein the sum of x and y is greater than zero; m represents the number of segments; and n represents the degree of polymerization.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: August 17, 2004
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Patent number: 6774393
    Abstract: A field effect transistor composed of: an insulating layer; a gate electrode; a semiconductor layer including an organic semiconductor material and a binder resin; a source electrode; and a drain electrode, wherein the insulating layer, the gate electrode, the semiconductor layer, the source electrode, and the drain electrode are in any sequence as long as the gate electrode and the semiconductor layer both contact the insulating layer, and the source electrode and the drain electrode both contact the semiconductor layer.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: August 10, 2004
    Assignee: Xerox Corporation
    Inventors: Dasarao K. Murti, Beng S. Ong, James M. Duff
  • Publication number: 20040075120
    Abstract: A process including:
    Type: Application
    Filed: October 17, 2002
    Publication date: April 22, 2004
    Applicant: Xerox Corporation
    Inventors: Yiliang Wu, Ping Liu, Beng S. Ong, Dasarao K. Murti
  • Publication number: 20040075124
    Abstract: A thin film transistor including:
    Type: Application
    Filed: November 24, 2003
    Publication date: April 22, 2004
    Applicant: Xerox Corporation
    Inventors: Yiliang Wu, Ping Liu, Beng S. Ong, Dasarao K. Murti
  • 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: 6621099
    Abstract: An electronic device containing a polythiophene of Formula (I) wherein R and R′ are side chains; A is a divalent linkage; x and y represent the number of unsubstituted thienylene units; z is 0 or 1, and wherein the sum of x and y is greater than about zero; m represents the number of segments; and n represents the degree of polymerization.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: September 16, 2003
    Assignee: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Publication number: 20030144466
    Abstract: Polythiophenes of the formula 1
    Type: Application
    Filed: January 11, 2002
    Publication date: July 31, 2003
    Applicant: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Publication number: 20030136958
    Abstract: An electronic device containing a polythiophene of Formula (I) 1
    Type: Application
    Filed: January 11, 2002
    Publication date: July 24, 2003
    Applicant: Xerox Corporation
    Inventors: Beng S. Ong, Lu Jiang, Yiliang Wu, Dasarao K. Murti
  • Publication number: 20030049551
    Abstract: An electrostatographic article including: a substrate; a charge generator layer overcoated on the substrate and which layer is sensitive to blue light; and a charge transport layer overcoated on the charge generator layer and which charge transport layer is transparent to blue light.
    Type: Application
    Filed: September 7, 2001
    Publication date: March 13, 2003
    Applicant: Xerox Corporation
    Inventors: Satish R. Parikh, Kathleen M. Carmichael, Edward F. Grabowski, Andrew R. Melnyk, Liang-Bih Lin, Andronique Ioannidis, Dasarao K. Murti, Harold F. Hammond
  • Patent number: 6319645
    Abstract: A photoconductive imaging member containing a photogenerating layer and a triphenylamine charge transport layer of the formula or optionally mixtures thereof wherein R1, R2, R3, R4, and R5 are each independently alkyl, aryl, hydrogen, alkoxy, and the like.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: November 20, 2001
    Assignee: Xerox Corporation
    Inventors: Dasarao K. Murti, James M. Duff, C. Geoffrey Allen
  • Patent number: 6214504
    Abstract: A photoconductive imaging member containing a photogenerator layer comprised of a mixture of bis(methylbenzimidazo)perinone, optionally an (alkylimido)perylene, such as (n-pentylimido)perylene or mixtures of (n-pentylimido)perylene, bisbenzimidazo(2,1-a-1′,2′-b)anthra(2,1,9-def:6,5,10-d′e′f′)diisoquinoline-6,11-dione and bisbenzimidazo(2,1-a:2′,1′-a)anthra(2,1,9-def:6,5,10-d′e′f′)diisoquinoline-10,21-dione, and a charge transport layer.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: April 10, 2001
    Assignee: Xerox Corporation
    Inventors: Mohammad Esteghamatian, Ah-Mee Hor, James M. Duff, C. Geoffrey Allen, Dasarao K. Murti