Patents by Inventor Tirthankar Ghosh

Tirthankar Ghosh 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: 8540893
    Abstract: A chemical mechanical polishing composition useful for chemical mechanical polishing of a patterned semiconductor wafer containing a nonferrous metal. The chemical mechanical polishing composition comprises an inhibitor for the nonferrous metal; a copolymer of poly(ethylene glycol)methyl ether (meth)acrylate and 1-vinylimidazole; and water.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: September 24, 2013
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Tirthankar Ghosh, Terence M. Thomas, Hongyu Wang, Scott A. Ibbitson
  • Publication number: 20130142886
    Abstract: A biocidal composition comprising 2,2-dibromomalonamide and a metal selected from silver, copper, and mixtures thereof, and its use for the control of microorganisms in aqueous and water-containing systems.
    Type: Application
    Filed: August 3, 2011
    Publication date: June 6, 2013
    Applicants: DOW GLOBAL TECHNOLOGIES LLC, ROHM AND HAAS CHEMICALS LLC
    Inventors: Freddie L. Singleton, Tirthankar Ghosh, Kimberly S. Cagle
  • Publication number: 20120126163
    Abstract: The present invention provides an aqueous composition useful for treating fabric comprising (i) a complex of silver ion with a copolymer and (ii) a dispersed amine-functional softener, wherein said copolymer comprises (a) 60-95 wt % polymerized units of one or more monomer X, wherein said monomer X is an ethylenically unsaturated compound having a substituent group selected from an unsaturated or aromatic heterocyclic group having at least one nitrogen atom; and (b) 5-40 wt % polymerized units of one or more monomer Y, wherein said monomer Y is an ethylenically unsaturated compound selected from carboxylic acids, organosulfuric acids, sulfonic acids, phosphonic acids, esters comprising polymerized units of ethylene oxide, and mixtures thereof. Also provided is a method of treating fabric comprising contacting said fabric with the composition of claim 1 at pH from 3 to 7.
    Type: Application
    Filed: November 9, 2011
    Publication date: May 24, 2012
    Inventor: TIRTHANKAR GHOSH
  • Publication number: 20120076942
    Abstract: There is provided an antimicrobial composition for treating fabric, wherein said antimicrobial composition is a liquid and wherein said antimicrobial composition comprises water and a metal/polymer complex, wherein the pH of said composition is 6.5 or lower; wherein the concentration of said metal/polymer complex is from 0.005% to 0.1% by weight based on the weight of said composition; wherein said metal is selected from copper, silver, gold, tin, zinc, and combinations thereof. Also provided is a method of finishing fabric using an exhaustion process with the composition of the present invention.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 29, 2012
    Inventors: Randall Liang, Tirthankar Ghosh
  • Patent number: 8007834
    Abstract: There is provided a coating composition comprising (a) one or more microbicide, (b) one or more soluble polymer comprising, as polymerized units, one or more monomer with one or more pendant heterocycle, wherein said heterocycle has one or more hetero atom selected from the group consisting of N, O, S, and combinations thereof, and wherein said polymer has no anionic groups, and (c) solvent, wherein said polymer is dissolved in said solvent; wherein said composition contains no polymeric biguanide; and wherein 50% or more of said microbicide, by weight based on the total weight of microbicide, is not covalently bonded to any polymer.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: August 30, 2011
    Assignee: Rohm and Haas Company
    Inventors: Jennifer Reichl Collin, Tirthankar Ghosh, Fanwen Zeng
  • Patent number: 7968619
    Abstract: A composition useful for treating fabrics. The composition contains a silver-containing copolymer having polymerized units of a monomer X and a monomer Y; wherein monomer X is an ethylenically unsaturated compound having a substituent group selected from an unsaturated or aromatic heterocyclic group having at least one nitrogen atom; wherein monomer Y is selected from carboxylic acids, carboxylic acid salts, carboxylic acid esters, organosulfuric acids, organosulfuric acid salts, sulfonic acids, sulfonic acid salts, phosphonic acids, phosphonic acid salts, vinyl esters, (meth)acrylamides, C8-C20 aromatic monomers containing at least one exocyclic ethylenic unsaturation and combinations thereof.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: June 28, 2011
    Assignee: Rohm and Haas Company
    Inventors: Stephanie Nussbaum Cottrell, Tirthankar Ghosh
  • Patent number: 7927379
    Abstract: A composition useful for treating fabrics. The composition contains a silver-containing copolymer having polymerized units of a monomer X which is an ethylenically unsaturated compound having a substituent group selected from an unsaturated or aromatic heterocyclic group having at least one nitrogen atom and polymerized units of a monomer Y which is an ethylenically unsaturated compound selected from carboxylic acids, organosulfuric acids, sulfonic acids, phosphonic acids and esters comprising polymerized units of ethylene oxide.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: April 19, 2011
    Assignee: Rohm and Haas Company
    Inventors: Stephanie Nussbaum Cottrell, Tirthankar Ghosh
  • Publication number: 20110073800
    Abstract: The aqueous abrasive-free composition is useful for chemical mechanical polishing of a patterned semiconductor wafer containing a nonferrous metal. The composition includes an oxidizer, an inhibitor for the nonferrous metal, 0 to 15 weight percent water soluble modified cellulose, 0 to 15 weight percent phosphorus compound, 0.005 to 5 weight percent of an acidic polymer, and water. The acidic polymer has a methacrylic acid portion having a carbon number of 4 to 250. The methacrylic acid portion includes either methacrylic acid or an acrylic acid/methacrylic acid copolymer. The acidic polymer including a segment from a mercapto-carboxylic acid chain transfer agent.
    Type: Application
    Filed: September 25, 2009
    Publication date: March 31, 2011
    Inventors: Hongyu Wang, Scott A. Ibbitson, Tirthankar Ghosh, Mark R. Winkle
  • Patent number: 7846856
    Abstract: Fibers that durably contain antimicrobial materials such that the antimicrobial materials are resistant to being abraided away or washed off during use. The antimicrobial materials contained in the fibers are not prone to the development of resistant strains of bacteria. Also disclosed are methods of making and using the fibers.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: December 7, 2010
    Assignee: Rohm and Haas Company
    Inventors: Tirthankar Ghosh, Barry Weinstein
  • Patent number: 7842656
    Abstract: A method for treating wood to inhibit leaching of copper compounds into the environment. The method comprises treating the wood with a copper-containing wood preservative and a latex copolymer.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: November 30, 2010
    Assignee: Rohm and Haas Company
    Inventors: John William Ashmore, David Michael Laganella, Tirthankar Ghosh, Nilesh Shah
  • Patent number: 7807765
    Abstract: A latex copolymer composition comprising >5 wt % of polymerized units derived from a monomer X containing an unsaturated heterocycle, wherein the latex copolymer composition comprises ?1,000 ppm of residual monomer X is disclosed. Also disclosed are methods of making and using the latex copolymer compositions.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: October 5, 2010
    Assignee: Rohm and Haas Company
    Inventors: Tirthankar Ghosh, Morris C. Wills
  • Publication number: 20100234519
    Abstract: A composition useful for treating fabrics. The composition contains a silver-containing copolymer having polymerized units of a monomer X and a monomer Y; wherein monomer X is an ethylenically unsaturated compound having a substituent group selected from an unsaturated or aromatic heterocyclic group having at least one nitrogen atom; wherein monomer Y is selected from carboxylic acids, carboxylic acid salts, carboxylic acid esters, organosulfuric acids, organosulfuric acid salts, sulfonic acids, sulfonic acid salts, phosphonic acids, phosphonic acid salts, vinyl esters, (meth)acrylamides, C8-C20 aromatic monomers containing at least one exocyclic ethylenic unsaturation and combinations thereof.
    Type: Application
    Filed: February 26, 2010
    Publication date: September 16, 2010
    Inventors: STEPHANIE NUSSBAUM COTTRELL, Tirthankar Ghosh
  • Publication number: 20100229311
    Abstract: A composition useful for treating fabrics. The composition contains a silver-containing copolymer having polymerized units of a monomer X which is an ethylenically unsaturated compound having a substituent group selected from an unsaturated or aromatic heterocyclic group having at least one nitrogen atom and polymerized units of a monomer Y which is an ethylenically unsaturated compound selected from carboxylic acids, organosulfuric acids, sulfonic acids, phosphonic acids and esters comprising polymerized units of ethylene oxide.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 16, 2010
    Inventors: Stephanie Nussbaum Cottrell, Tirthankar Ghosh
  • Publication number: 20100190404
    Abstract: Fibers that durably contain antimicrobial materials such that the antimicrobial materials are resistant to being abraided away or washed off during use. The antimicrobial materials contained in the fibers are not prone to the development of resistant strains of bacteria. Also disclosed are methods of making and using the fibers.
    Type: Application
    Filed: April 14, 2010
    Publication date: July 29, 2010
    Applicant: ROHM AND HAAS CHEMICAL COMPANY
    Inventors: Tirthankar Ghosh, Barry Weinstein
  • Patent number: 7740906
    Abstract: A method for preserving wood by contacting wood with a composition comprising an aqueous polymer dispersion, at least one surfactant, and a wood preservative.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: June 22, 2010
    Assignee: Rohm and Haas Company
    Inventors: John William Ashmore, Tirthankar Ghosh, Jose Pineda Lalas
  • Publication number: 20100081729
    Abstract: There is provided a coating composition comprising (a) one or more microbicide, (b) one or more soluble polymer comprising, as polymerized units, one or more monomer with one or more pendant heterocycle, wherein said heterocycle has one or more hetero atom selected from the group consisting of N, O, S, and combinations thereof, and wherein said polymer has no anionic groups, and (c) solvent, wherein said polymer is dissolved in said solvent; wherein said composition contains no polymeric biguanide; and wherein 50% or more of said microbicide, by weight based on the total weight of microbicide, is not covalently bonded to any polymer.
    Type: Application
    Filed: September 3, 2009
    Publication date: April 1, 2010
    Inventors: Jennifer Reichl Collin, Tirthankar Ghosh, Fanwen Zeng
  • Publication number: 20100029079
    Abstract: A chemical mechanical polishing composition useful for chemical mechanical polishing of a patterned semiconductor wafer containing a nonferrous metal. The chemical mechanical polishing composition comprises an inhibitor for the nonferrous metal; a copolymer of poly(ethylene glycol)methyl ether (meth)acrylate and 1-vinylimidazole; and water.
    Type: Application
    Filed: August 4, 2008
    Publication date: February 4, 2010
    Inventors: Tirthankar Ghosh, Terence M. Thomas, Hongyu Wang
  • Publication number: 20090143540
    Abstract: An aqueous composition comprising polymer particles of one or more multistage aqueous emulsion, at least one of which is a multistage aqueous emulsion copolymer comprising polymerized units derived from monomer X in at least one stage, wherein monomer X is selected from polymerizable derivatives of imidazole, imidazoline, amidine, pyridine, pyrrole, pyrrolidine, pyrrolidinone, caprolactam, and combinations thereof. Also disclosed are methods of making and using the compositions.
    Type: Application
    Filed: November 21, 2008
    Publication date: June 4, 2009
    Inventors: Tirthankar Ghosh, Joseph Martin Rokowski, Morris Christopher Wills
  • Publication number: 20090137747
    Abstract: An aqueous composition comprising polymer particles of one or more aqueous emulsion copolymer and a homopolymer comprising polymerized units derived from monomer X, wherein monomer X is selected from polymerizable derivatives of imidazole, imidazoline, amidine, pyridine, pyrrole, pyrrolidine, pyrrolidinone, caprolactam, and combinations thereof. Also disclosed are methods of making and using the compositions.
    Type: Application
    Filed: November 26, 2008
    Publication date: May 28, 2009
    Inventors: Tirthankar Ghosh, Joseph Martin Rokowski, Morris Christopher Wills
  • Patent number: 7435356
    Abstract: An aqueous abrasive-free composition is useful for chemical mechanical polishing of a patterned semiconductor wafer containing a nonferrous metal. The composition comprises an oxidizer, an inhibitor for the nonferrous metal, 0 to 15 weight percent water soluble modified cellulose, 0 to 15 weight percent phosphorus compound, 0.005 to 5 weight percent of an amphiphilic polymer, the amphiphilic polymer having an ionic hydrophilic portion with a carbon number of 2 to 250 and water.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: October 14, 2008
    Assignee: Rohm and Haas Electronic Materials CMP Holdings, Inc.
    Inventors: Tirthankar Ghosh, Robert D. Solomon, Hongyu Wang