Patents by Inventor Beth A. Smith

Beth A. Smith 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).

  • Aqueous microgel from carboxyl latex polymer, acrylic-epoxy and diepoxide
    Patent number: 5877239
    Abstract: An aqueous protective coating composition particularly useful for can coatings based on a polymeric binder comprises diepoxide crosslinked microgel particles. The microgel polymer is produced by dispersing into water a carboxyl functional acrylic-epoxy copolymer and combined with a carboxyl functional latex polymer along with a low molecular weight diepoxide, followed by coreaction and crosslinking between the carboxyl polymers and the diepoxide to form stable aqueous dispersed microgel particles. In a preferred aspect of the invention, the carboxyl latex polymer is a swollen latex polymer.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: March 2, 1999
    Assignee: The Glidden Company
    Inventors: Gary P. Craun, Beth A. Smith, Neal S. Williams