Patents by Inventor Ravindra L. Arudi

Ravindra L. Arudi 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).

  • Crosslinked polymer electrolyte compositions
    Patent number: 6673273
    Abstract: Electrolyte compositions for use in cells and batteries that include a crosslinked solid ionically conductive polymer having urethane groups, urea groups, thiocarbamate groups, or combinations thereof, particles, and a salt. Certain electrolyte compositions include a liquid thereby forming a gel electrolyte composition.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: January 6, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Dinh Ba Le, Jerome Edward Scanlan, Ravindra L. Arudi
  • Crosslinked polymer electrolyte compositions
    Publication number: 20030094599
    Abstract: Electrolyte compositions for use in cells and batteries that include a crosslinked solid ionically conductive polymer having urethane groups, urea groups, thiocarbamate groups, or combinations thereof, particles, and a salt. Certain electrolyte compositions include a liquid thereby forming a gel electrolyte composition.
    Type: Application
    Filed: October 24, 2001
    Publication date: May 22, 2003
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Dinh Ba Le, Jerome Edward Scanlan, Ravindra L. Arudi
  • Magnetic recording medium incorporating fluorine-containing, solvent-soluble vinyl copolymer having no vinyl chloride or vinylidene chloride components
    Patent number: 6265060
    Abstract: A magnetic recording medium, comprising a magnetic layer provided on a nonmagnetizable substrate, wherein the magnetic layer comprises a magnetic pigment dispersed in a polymeric binder, the polymeric binder comprising a resin, wherein the resin comprises a nonchlorinated fluorine-containing vinyl copolymer having pendant nitrile groups, pendant hydroxyl groups, and pendant fluorine-containing groups.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: July 24, 2001
    Assignee: Imation Corp.
    Inventors: Ravindra L. Arudi, Ramesh C. Kumar
  • Self-wetting binders for magnetic media
    Patent number: 5681896
    Abstract: This invention is a quaternary ammonium/isocyanate compound having the formulaOCN-Z-Q.sup.+ A.sup.-,whereinZ is a divalent organic moiety;Q is a quaternary ammonium moiety; andA is a monovalent anionic counterion.Use of this quaternary ammonium/isocyanate compound or its amine/isocyanate compound enables one to convert any hydroxy containing binder into a self-wetting binder.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 28, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ravindra L. Arudi
  • Magnetic recording medium incorporating fluorine-containing, solvent-soluble vinyl copolymer having no vinyl chloride or vinylidene chloride components
    Patent number: 5679752
    Abstract: A magnetic recording medium, comprising a magnetic layer provided on a nonmagnetizable substrate, wherein the magnetic layer comprises a magnetic pigment dispersed in a polymeric binder, the polymeric binder comprising a resin, wherein the resin comprises a nonchlorinated fluorine-containing vinyl copolymer having pendant nitrile groups, pendant hydroxyl groups, and pendant fluorine-containing groups.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: October 21, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ravindra L. Arudi, Ramesh C. Kumar
  • Dispersing polymers for phthalocyanine pigments used in organic photoconductors
    Patent number: 5597675
    Abstract: A phthalocyanine pigment dispersion using a dispersing polymer having pendant quaternary ammonium salt groups to form a highly dispersed and stable millbase is described. The pigment dispersion is compatible with poly(vinylbutyral) resins and stable in ketone solvents. The pigment dispersion is particularly useful as a charge-generating or charge-transport material in an organic photoconductor construction.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: January 28, 1997
    Assignee: Imation Corp.
    Inventors: Ravindra L. Arudi, John C. Haidos
  • Dispersing polymers for phthalocyanine pigments used in organic photoconductors
    Patent number: 5536611
    Abstract: A phthalocyanine pigment dispersion using a dispersing polymer having pendant quaternary ammonium salt groups to form a highly dispersed and stable millbase is described. The pigment dispersion is compatible with poly(vinylbutyral) resins and stable in ketone solvents. The pigment dispersion is particularly useful as a charge-generating or charge-transport material in an organic photoconductor construction.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: July 16, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ravindra L. Arudi, John C. Haidos
  • Magnetic recording medium having radiation curable binder with .alpha.-methylstyrene unsaturation
    Patent number: 5523115
    Abstract: The present invention provides magnetic recording media comprising a magnetizable layer and optionally a backside coating provided on a nonmagnetizable substrate. At least one of the magnetizable layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is obtained from reactants comprising a free radical generator and a radiation curable polymer. The radiation curable polymer comprises a plurality of radiation curable, .alpha.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: June 4, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John C. Haidos, Ravindra L. Arudi, Nelson T. Rotto
  • Magnetic recording medium whose magnetic layer incorporates nonhalogenated vinyl copolymer and specified polyurethane polymer
    Patent number: 5510187
    Abstract: Magnetic recording medium, comprising a magnetic layer provided on a nonmagnetizable substrate, wherein the magnetic layer comprises a magnetic pigment dispersed in a polymeric binder. The polymeric binder comprises a nonhalogenated vinyl copolymer, wherein the vinyl copolymer comprises a plurality of pendant nitrile groups, a plurality of pendant hydroxyl groups, and at least one pendant dispersing group. Preferably, the binder also includes a secondary polymer component.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: April 23, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ramesh C. Kumar, Ravindra L. Arudi, James G. Carlson, Daniel Y. Chang, John C. Haidos, Keith J. Modert, Suman K. Patel, Nelson T. Rotto
  • Self-wetting binders for magnetic media
    Patent number: 5503938
    Abstract: This invention is a quaternary ammonium/isocyanate compound having the formulaOCN--Z--Q.sup.+ A.sup.-,whereinZ is a divalent organic moiety;Q is a quaternary ammonium moiety; andA is a monovalent anionic counterion. Use of this quaternary ammonium/isocyanate compound or its amine/isocyanate compound enables one to convert any hydroxy containing binder into a self-wetting binder.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: April 2, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Ravindra L. Arudi
  • Magnetic recording medium having radiation curable binder with .alpha.-methylstyrene unsaturation
    Patent number: 5380905
    Abstract: The present invention provides magnetic recording media comprising a magnetizable layer and optionally a backside coating provided on a nonmagnetizable substrate. At least one of the magnetizable layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is obtained from reactants comprising a free radical generator and a radiation curable polymer. The radiation curable polymer comprises a plurality of radiation curable, .alpha.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: January 10, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John C. Haidos, Ravindra L. Arudi, Nelson T. Rotto
  • Thin film-coated polymer webs
    Patent number: 5085939
    Abstract: The present invention relates to thin film-coated polymer webs, and more particularly to thin film electronic devices supported upon a polymer web, wherein the polymer web is treated with a purifying amount of electron beam radiation.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: February 4, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert P. Wenz, Michael F. Weber, Ravindra L. Arudi