Patents by Inventor Bala Srinivas

Bala Srinivas 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).

  • Water soluble dye complexing polymers
    Patent number: 6103831
    Abstract: This invention relates to dye complexing polymers, and, more particularly, to water soluble poly(vinylpyridine betaines) containing a quaternary nitrogen and a carboxylate salt. The polymers herein have effective dye transfer inhibitor (DTI) properties for use, for example, laundry detergent and fabric softener compositions.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: August 15, 2000
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Bala Srinivas, John C. Hornby
  • Water soluble dye complexing polymers
    Patent number: 6093776
    Abstract: This invention relates to dye complexing polymers, and, more particularly, to water soluble poly(vinylpyridine betaines) containing a quaternary nitrogen and a carboxylate salt. The-polymers herein have effective dye transfer inhibitor (DTI) properties for use, for example, laundry detergent and fabric softener compositions.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: July 25, 2000
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Bala Srinivas, John C. Hornby
  • Process for producing a suspension of a vinylpyridine polymer in high polymer purity
    Patent number: 6011096
    Abstract: This invention relates to an improved free radical polymerization process for directly producing stable vinylpyridine polymer particles in an aqueous suspension and in a high state of polymer purity by effecting the polymerization in the presence of a water soluble suspension agent selected from the group of polyvinyl lactam, a hydroxy-containing polymer, a polyvinyl alcohol and a mixture thereof.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: January 4, 2000
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Eduardo T. Yap, John C. Hornby, Bala Srinivas
  • Water soluble dye complexing polymers
    Patent number: 5929175
    Abstract: This invention relates to dye complexing polymers, and, more particularly, to water soluble poly(vinylpyridine betaines) containing a quaternary nitrogen and a carboxylate salt. The polymers herein have effective dye transfer inhibitor (DTI) properties for use, for example, laundry detergent and fabric softener compositions.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: July 27, 1999
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Bala Srinivas, John C. Hornby
  • Fabric softening compositions with dye transfer inhibitors for improved fabric appearance
    Patent number: 5869442
    Abstract: A fabric softening composition capable of reducing the transfer of dyes during subsequent wash cycles comprising:I. an effective amount of fabric softening agent; andII. an effective amount of water-soluble polymeric dye transfer inhibitor which is a poly(vinylpyridine betainecontaining a quaternary nitrogen and a carboxylate salt having dye transfer inhibitor properties having the formula: ##STR1## where m defines a repeating unit; X is an anion;R and R.sub.2 are independently hydrogen, alkyl or aryl;n is 1-5; andM is a cation; and copolymers thereof.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: February 9, 1999
    Assignee: ISP Investments Inc.
    Inventors: Bala Srinivas, Jenn S. Shih, John C. Hornby
  • Laundry detergent compositions containing water soluble dye complexing polymers
    Patent number: 5863880
    Abstract: A laundry detergent composition suitable for washing colored fabrics includes a water soluble poly(4-vinylpyridine betaine) polymer containing a quaternary nitrogen and a carboxylate salt as a dye transfer inhibitor therein.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: January 26, 1999
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Bala Srinivas, John C. Hornby
  • Water soluble dye complexing polymers
    Patent number: 5776879
    Abstract: This invention relates to dye complexing polymers, and, more particularly, to water soluble poly(vinylpyridine betaines) containing a quaternary nitrogen and a carboxylate salt. The polymers herein have effective dye transfer inhibitor (DTI) properties for use, for example, laundry detergent and fabric softener compositions.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: July 7, 1998
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Bala Srinivas, John C. Hornby