Patents by Inventor Eduardo T. Yap

Eduardo T. Yap 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).

  • Rheology modifier/hair styling resin
    Patent number: 7205271
    Abstract: A rheology modifier/hair styling resin which is a crosslinked, linear poly(vinyl amide/polymerizable carboxylic acid) copolymer exhibits advantageous hair care properties of high viscosity and long-lasting curl retention.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: April 17, 2007
    Assignee: ISP Investments Inc.
    Inventors: Michael Drzewinski, Joseph Albanese, Eduardo T. Yap, Jenn S. Shih
  • Product and process for making quaternized, water soluble vinylpyridine carboxylate polymers
    Patent number: 6271386
    Abstract: This invention relates to stable, quaternized vinlypyridine carboxylate home-, co- and ter-polymers, useful as dye transfer inhibitors and polymers complexable with active agrochemical, pharmaceutical or cosmetic agents for controlled release thereof, and to a commercial process for the synthesis of said polymers in high yield and purity.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: August 7, 2001
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Eduardo T. Yap, John C. Hornby, Bala Srinivas
  • Process for making quaternized vinylpyridine carboxylate polymers using suspension polymerization
    Patent number: 6201046
    Abstract: This invention relates to the preparation of stable, quaternized vinylpyridine carboxylate homo-, co- and ter-polymers in high yield and purity, which polymers are useful as dye transfer inhibitors and polymers complexable with active agrochemical, pharmaceutical or cosmetic agents for controlled release thereof.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: March 13, 2001
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Eduardo T. Yap, John C. Hornby, Bala Srinivas
  • Product and process for making quaternized, water soluble vinylpyridine carboxylate polymers
    Patent number: 6156829
    Abstract: This invention relates to stable, quaternized vinylpyridine carboxylate co-polymers, useful as dye transfer inhibitors and polymers complexable with active agrochemicals or pharmaceuticals for controlled release thereof, and to a commercial process for the synthesis thereof in high yield and purity.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: December 5, 2000
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Eduardo T. Yap, John C. Hornby, Bala Srinivas
  • 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