Patents by Inventor Steven Y. Chan

Steven Y. Chan 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: 5434215
    Abstract: This invention relates to a method for forming an aqueous polymeric dispersion incorporating a wax. To form the aqueous dispersion, a polymer is formed by polymerizing at least one ethylenically unsaturated monomer under conditions for forming a polymer suspended in an aqueous medium in the presence of said wax. The polymerization of the monomer in the presence of a wax in finely divided form permits the formation of a stable dispersion having excellent properties. The surfactant system is a multiple system consisting of a nonionic and/or anionic surfactant and/or an alkali metal salt of a fatty acid ester.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: July 18, 1995
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mahalingam Sankaran, Steven Y. Chan
  • Patent number: 4980408
    Abstract: The invention relates to novel water-based surface and lamination printing ink compositions and to their use as surface printing inks for printing onto substrates and in particular for printing onto plastic substrates. The surface printing inks of the present invention are superior in printing aptitude and color strength.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: December 25, 1990
    Assignee: BASF Corporation
    Inventor: Steven Y. Chan