Patents by Inventor Prachur Bhargava

Prachur Bhargava 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: 10265263
    Abstract: A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 23, 2019
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Shui-Jen Raymond Hsu, Krishnan Chari, Wei-Yeih Yang, Prachur Bhargava, Murat Kadir
  • Patent number: 9834695
    Abstract: The presently disclosed claimed inventive concept(s) relates generally to a rheology modifier composition and an aqueous protective coating composition containing the rheology modifier composition. More particularly, the presently disclosed and/or claimed inventive concept(s) relates to a rheology modifier composition comprising (a) about 50 to about 99% by weight of a water soluble polymer and about 1 to about 50% by weight of a cationic polymer, wherein the cationic polymer is produced by polymerizing a quaternized monomer or by polymerizing a quaternized monomer and a non-quaternized monomer. Additionally, the presently disclosed and/or claimed inventive concept(s) relates generally to the methods of making the rheology modifier composition and the aqueous protective coating composition.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: December 5, 2017
    Assignee: HERCULES LLC
    Inventors: Prachur Bhargava, Jeffrey K. Politis
  • Publication number: 20170305793
    Abstract: The presently disclosed and/or claimed inventive concept(s) relates generally to a stone paint formulation. More particularly, the presently disclosed and/or claimed inventive concept(s) relates to a stone paint comprising a composition A and a composition B. The composition A comprises a latex emulsion, a rheology modifier, a coalescing agent, a biocide, a neutralizing agent and a solvent. The composition B comprises a sand. Additionally, the presently disclosed and/or claimed inventive concept(s) relates to a method of making the stone paint formulation by using the rheology modifier. The stone paint of the presently disclosed and/or claimed inventive concept(s) has enhanced resistance to water-whitening.
    Type: Application
    Filed: August 31, 2015
    Publication date: October 26, 2017
    Applicant: HERCULES LLC
    Inventors: Kelly Anne BRUSH, Tarimala SOWMITRI, Prachur BHARGAVA
  • Patent number: 9714376
    Abstract: A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The crosslinked, nonionic amphiphilic polymer is prepared by dispersion polymerization in the presence of a stabilizing polymer. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 25, 2017
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Wei-Yeih Yang, Krishnan Chari, Shui-Jen Raymond Hsu, Prachur Bhargava
  • Patent number: 9441118
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a dry powder composition comprising water soluble polymer powders, and a component in powder form. The dry powder composition shows improved water dispersibility compared to the water soluble polymer powders. The presently disclosed and claimed inventive concept(s) further relates to an aqueous protective coating composition comprising the dry powder composition.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: September 13, 2016
    Assignee: Hercules Incorporated
    Inventors: Prachur Bhargava, Michael A. Tallon, Konstantin A. Vaynberg
  • Patent number: 9321851
    Abstract: The present invention relates generally to water soluble polymer powder formulations, and more particularly, to a cellulose ether formulation which in powder form is suitable for direct addition to water-based systems to produce smooth, lump free solutions. The cellulose ethers are crosslinked with an aldehyde crosslinker and include a dry weak acid which slows hydrolysis of the hermiacetal linkage formed by the crosslinker. The selected acid does not adversely affect solubility stability.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: April 26, 2016
    Assignee: HERCULES INCORPORATED
    Inventors: Prachur Bhargava, Glen T. Carroll, Tuyen T. Nguyen, Kostantin A. Vaynberg
  • Patent number: 9321908
    Abstract: The present invention relates generally to a method for dispersing a dry cellulose ether powder in an aqueous solution without forming lumps using powder handling and mixing devices. The cellulose ethers can be cross-linked with an aldehyde cross-linker. An acid or partially neutralized acid is used to improve the solubility.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: April 26, 2016
    Assignee: HERCULES INCORPORATED
    Inventors: Prachur Bhargava, Konstantin A. Vaynberg
  • Patent number: 9096755
    Abstract: A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 4, 2015
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Krishnan Chari, Shui-Jen Raymond Hsu, Wei-Yeih Yang, Prachur Bhargava, Murat Kadir
  • Publication number: 20150112000
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a method for making a particular product comprising a nonionic synthetic associative (NSAT) rheology modifier and a dissolution promotion water soluble additive. The method comprising the steps of: (a) obtaining the NSAT theology modifier and the dissolution promotion water soluble additive; (b) melting the NSAT theology modifier and the dissolution promotion water soluble additive; (c) mixing the molten NSAT theology modifier and the dissolution promotion water soluble additive; and (d) producing the particulate product from step (c). The NSAT rheology modifier is selected from the group consisting of hydrophobically-modified ethoxylated urethane (HEUR), hydrophobically-modified polyethylene glycol (HMPEG), and hydrophobically-modified polyacetal-polyether (HMPAPE). The particulate product prepared from the method is incorporated into a waterborne paint formula.
    Type: Application
    Filed: December 23, 2014
    Publication date: April 23, 2015
    Inventors: Prachur Bhargava, Paul C. Gillette, Tuyen T. Nguyen
  • Publication number: 20150105500
    Abstract: The presently disclosed claimed inventive concept(s) relates generally to a rheology modifier composition and an aqueous protective coating composition containing the rheology modifier composition. More particularly, the presently disclosed and/or claimed inventive concept(s) relates to a rheology modifier composition comprising (a) about 50 to about 99% by weight of a water soluble polymer and about 1 to about 50% by weight of a cationic polymer, wherein the cationic polymer is produced by polymerizing a quaternized monomer or by polymerizing a quaternized monomer and a non-quaternized monomer. Additionally, the presently disclosed and/or claimed inventive concept(s) relates generally to the methods of making the rheology modifier composition and the aqueous protective coating composition.
    Type: Application
    Filed: October 3, 2014
    Publication date: April 16, 2015
    Inventors: Prachur BHARGAVA, Jeffrey K. Politis
  • Publication number: 20140364511
    Abstract: A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.
    Type: Application
    Filed: September 13, 2012
    Publication date: December 11, 2014
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Krishnan Chari, Shui-Jen Raymond Hsu, Wei-Yeih Yang, Prachur Bhargava, Murat Kadir
  • Publication number: 20140348887
    Abstract: A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.
    Type: Application
    Filed: September 13, 2012
    Publication date: November 27, 2014
    Applicant: Lubrizol Advanced Materials, Inc.
    Inventors: Shui-Jen Raymond Hsu, Krishnan Chari, Wei-Yeih Yang, Prachur Bhargava, Murat Kadir
  • Publication number: 20140341957
    Abstract: A stable, aqueous composition containing a crosslinked, nonionic, amphiphilic polymer capable of forming a yield stress fluid in the presence of a surfactant is disclosed. The crosslinked, nonionic amphiphilic polymer is prepared by dispersion polymerization in the presence of a stabilizing polymer. The yield stress fluid is capable of suspending insoluble materials in the form of particulates and/or droplets requiring suspension or stabilization.
    Type: Application
    Filed: September 13, 2012
    Publication date: November 20, 2014
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Wei-Yeih Yang, Krishnan Chari, Shui-Jen Raymond Hsu, Prachur Bhargava
  • Publication number: 20140007791
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a dry powder composition comprising water soluble polymer powders, and a component in powder form. The dry powder composition shows improved water dispersibility compared to the water soluble polymer powders. The presently disclosed and claimed inventive concept(s) further relates to an aqueous protective coating composition comprising the dry powder composition.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 9, 2014
    Inventors: Prachur Bhargava, Michael A. Tallon, Konstantin A. Vaynberg
  • Publication number: 20130233205
    Abstract: The present invention relates generally to a method for dispersing a dry cellulose ether powder in an aqueous solution without forming lumps using powder handling and mixing devices. The cellulose ethers can be cross-linked with an aldehyde cross-linker. An acid or partially neutralized acid is used to improve the solubility.
    Type: Application
    Filed: April 22, 2013
    Publication date: September 12, 2013
    Applicant: Hercules Incorporated
    Inventors: Prachur Bhargava, Konstantin A. Vaynberg
  • Publication number: 20130030091
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a particulate product. The particulate product comprises a nonionic synthetic associative thickener NSAT) rheology modifier and a dissolution promotion water soluble additive. The NSAT rheology modifier is selected from the group consisting of hydrophobically-modified ethoxylated urethane (HEUR), hydrophobically-modified polyethylene glycol and hydrophobically-modified polyacetal-polyether (HMPAPE). The particulate product is incorporated into a waterborne paint formula.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Applicant: HERCULES INCORPORATED
    Inventors: Prachur Bhargava, Paul C. Gillette, Tuyen T. Nguyen
  • Publication number: 20120247367
    Abstract: The present invention relates generally to water soluble polymer powder formulations, and more particularly, to a cellulose ether formulation which in powder form is suitable for direct addition to water-based systems to produce smooth, lump free solutions. The cellulose ethers are crosslinked with an aldehyde crosslinker and include a dry weak acid which slows hydrolysis of the hermiacetal linkage formed by the crosslinker. The selected acid does not adversely affect solubility stability.
    Type: Application
    Filed: March 5, 2012
    Publication date: October 4, 2012
    Inventors: Prachur Bhargava, Glen T. Carroll, Tuyen T. Nguyen, Kostantin A. Vaynberg