Patents by Inventor Sridhar Gopalkrishnan

Sridhar Gopalkrishnan 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).

  • Polymeric dispersants for soda ash based detergent slurries
    Patent number: 5595968
    Abstract: An aqueous soda ash based detergent slurry composition comprising (A) about 5-65% of inorganic builder salt comprising soda ash, and (B) about 0.01-20% of a copolymer comprising an unsaturated monomer copolymerized with an oxyalkylated monomer.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: January 21, 1997
    Assignee: BASF Corporation
    Inventors: Sridhar Gopalkrishnan, Kathleen M. Guiney
  • Stable, aqueous concentrated liquid detergent compositions containing hydrophilic copolymers
    Patent number: 5536440
    Abstract: A hydrophilic co-polymer, useful in stabilizing laundry detergent, comprising two hydrophilic monomers: an unsaturated hydrophilic monomer co-polymerized with a hydrophilic oxyalkylated monomer.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: July 16, 1996
    Assignee: BASF Corporation
    Inventors: Sridhar Gopalkrishnan, John V. Sherman, Kathleen M. Guiney, David T. Durocher, Michael C. Welch
  • Stable, aqueous concentrated liquid detergent compositions containing hydrophilic copolymers
    Patent number: 5534183
    Abstract: A stable aqueous detergent composition, comprising: (a) about 5.70% of detergent active matter selected from the group consisting of anionic, nonionic, cationic, amphoteric, and zwitterionic surfactants; (b) about 1-60% of one or more electrolytes; and (c) about 0.01-5% of at least one hydrophilic copolymer comprising hydrophilic monomer and oxyethylated monomer. In particular, the hydrophilic copolymer is of a structure represented by ##STR1## wherein the above-stated substituents are defined herein.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: July 9, 1996
    Assignee: BASF Corporation
    Inventors: Sridhar Gopalkrishnan, John V. Sherman, Kathleen M. Guiney, David T. Durocher, Michael C. Welch
  • Emulsion polymerization process utilizing a specifically defined ethylenically unsaturated polymerizable water-soluble nonionic surfactant formed by the reaction of a diallylamine, ethylene oxide and propylene oxide and/or butylene oxide
    Patent number: 5478883
    Abstract: An improved emulsion polymerization process utilizing at least one substantially water-insoluble ethylenically unsaturated monomer is provided for forming discrete solid polymeric particles suitable for use in coating and/or adhesive applications. During at least the initial portion of the polymerization a dissolved water-soluble polymerizable surfactant (as defined) formed by the reaction of a diallylamine, ethylene oxide, and propylene oxide and/or butylene oxide additionally is provided in the reaction zone in the continuous aqueous phase. The water-soluble polymerizable surfactant undergoes copolymerization and is substantially completely consumed during the course of the emulsion polymerization.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: December 26, 1995
    Assignee: BASF Corporation
    Inventors: Michael J. Anchor, Sridhar Gopalkrishnan
  • Additive composition for oil well cementing formulations
    Patent number: 5401786
    Abstract: An oil and gas well cementing composition has styrene/butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: March 28, 1995
    Assignee: BASF Corporation
    Inventor: Sridhar Gopalkrishnan
  • Additive composition for oil well cementing formulations having nonionic and anionic surfactant stablizers to improve the fluid loss properties thereof
    Patent number: 5300542
    Abstract: An oil and gas well cementing composition has styrene/ butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: April 5, 1994
    Assignee: BASF Corp.
    Inventor: Sridhar Gopalkrishnan
  • Oil well cementing formulations
    Patent number: 5262452
    Abstract: An oil and gas well cementing composition has styrene/butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: November 16, 1993
    Assignee: BASF Corp.
    Inventor: Sridhar Gopalkrishnan
  • Additive composition for oil well cementing formulations
    Patent number: 5258428
    Abstract: An oil and gas well cementing composition has styrene/butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: November 2, 1993
    Inventor: Sridhar Gopalkrishnan
  • Additive composition for oil well cementing formulations
    Patent number: 5252128
    Abstract: An oil and gas well cementing composition has styrene/butadiene latex and a combination of nonionic and anionic surfactants for improved physical properties, especially fluid loss.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: October 12, 1993
    Assignee: BASF Corporation
    Inventor: Sridhar Gopalkrishnan