Patents by Inventor Ari K. Kar

Ari K. Kar 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).

  • Publication number: 20220380519
    Abstract: A metal-chelating resin includes (a) a compound represented by Formula (I): or a stereoisomeric form thereof or a salt thereof, wherein R1, R2, R3, R4, Ra, Rb, Rc and Rd are as defined herein; and (b) an organic polymer resin having at least one complementary reactive functional group covalently linked with at least one linking group of the compound represented by Formula (I).
    Type: Application
    Filed: May 4, 2022
    Publication date: December 1, 2022
    Inventors: Barry L. Haymore, Sara S. Moghaddam, Charles B. Little, Ari K. Kar
  • Publication number: 20220380520
    Abstract: A metal-chelating resin includes (a) a compound represented by Formula (I): or a stereoisomeric form thereof or a salt thereof, wherein R1, R2, R3, R4, Ra, Rb, Rc and Rd are as defined herein; and (b) an organic polymer resin having at least one complementary reactive functional group covalently linked with at least one linking group of the compound represented by Formula (I).
    Type: Application
    Filed: May 4, 2022
    Publication date: December 1, 2022
    Inventors: Barry L. Haymore, Sara S. Moghaddam, Charles B. Little, Ari K. Kar
  • Patent number: 9127107
    Abstract: The present invention provides aqueous amphiphilic emulsion copolymer compositions comprising one or more aqueous phase copolymer, a residue of one or more hydrophilic chain transfer agent, and a residue of one or more hydrophobic chain transfer agent, as well as methods of making such copolymers in water or an aqueous liquid by copolymerizing a monomer component of from 20 to 80 wt. %, based on the weight of the monomer component, of a hydrophilic group-containing monomer and the remainder of a copolymerizable ethylenically unsaturated monomer or prepolymer in the presence of a mixed chain transfer agent component comprising a hydrophilic chain transfer agent, such as 3-mercaptopropionic acid, and a hydrophobic chain transfer agent, such as N-dodecyl mercaptan. The aqueous amphiphilic emulsion copolymers of the present invention are storage stable and exhibit excellent viscosity control even in high solids compositions, e.g. from 50 to 80 wt. % of the composition.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: September 8, 2015
    Assignee: Rohm and Haas Company
    Inventors: Shang-Jaw Chiou, Ari K. Kar, Robert F. Dougherty
  • Patent number: 7829626
    Abstract: The present invention provides aqueous matte coating compositions comprising a binder component B) and a polymeric duller component A) composed of particles of one or more multi-stage copolymer or single stage crosslinked (co)polymer, e.g. crosslinked t-butyl (meth)acrylate, the duller component particles A) having an average diameter of 1-20 ?m. Components A) and B) are compatible. Preferably, the duller component A) is acrylic; more preferably, components A) and B) are acrylic. The aqueous compositions provide matte coatings having haptic or feel (soft touch) properties, film and appearance properties, including burnish resistance and low color loss.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: November 9, 2010
    Assignee: Rohm and Haas Company
    Inventors: Shang-Jaw Chiou, Bradley K. Hageman, Joseph M. Hoefler, Ari K. Kar, Edwin H. Nungesser, John D. Whiteman, Dianzhi Yang
  • Publication number: 20080058456
    Abstract: The present invention provides aqueous amphiphilic emulsion copolymer compositions comprising one or more aqueous phase copolymer, a residue of one or more hydrophilic chain transfer agent, and a residue of one or more hydrophobic chain transfer agent, as well as methods of making such copolymers in water or an aqueous liquid by copolymerizing a monomer component of from 20 to 80 wt. %, based on the weight of the monomer component, of a hydrophilic group-containing monomer and the remainder of a copolymerizable ethylenically unsaturated monomer or prepolymer in the presence of a mixed chain transfer agent component comprising a hydrophilic chain transfer agent, such as 3-mercaptopropionic acid, and a hydrophobic chain transfer agent, such as N-dodecyl mercaptan. The aqueous amphiphilic emulsion copolymers of the present invention are storage stable and exhibit excellent viscosity control even in high solids compositions, e.g. from 50 to 80 wt. % of the composition.
    Type: Application
    Filed: August 21, 2007
    Publication date: March 6, 2008
    Inventors: Shang-Jaw Chiou, Ari K. Kar, Robert F. Dougherty
  • Publication number: 20070218291
    Abstract: The present invention provides aqueous matte coating compositions comprising a binder component B) and a polymeric duller component A) composed of particles of one or more multi-stage copolymer or single stage crosslinked (co)polymer, e.g. crosslinked t-butyl (meth)acrylate, the duller component particles A) having an average diameter of 1-20 ?m. Components A) and B) are compatible. Preferably, the duller component A) is acrylic; more preferably, components A) and B) are acrylic. The aqueous compositions provide matte coatings having haptic or feel (soft touch) properties, film and appearance properties, including burnish resistance and low color loss.
    Type: Application
    Filed: February 26, 2007
    Publication date: September 20, 2007
    Inventors: Shang-Jaw Chiou, Bradley K. Hageman, Joseph M. Hoefler, Ari K. Kar, Edwin H. Nungesser, John D. Whiteman, Dianzhi Yang