Patents by Inventor Tong Z. Liu

Tong Z. Liu 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).

  • Paint formulation
    Patent number: 5520963
    Abstract: This invention relates to a coating composition having a low concentration of cellulose acetate butyrate so as to minimize the formation of defects in the coating when dried and particularly relates to a urethane paint for spraying having cellulose acetate butyrate with a concentration between 0.1 and 2% by weight of the total solids in the ready-to-spray paint. A method of spraying an article with urethane paint is also described which comprises the steps of: adding cellulose acetate butyrate to urethane paint, and spraying an article, where the concentration of cellulose acetate butyrate is selected to have a concentration between 0.1 to 2.0% by weight of the total solids in said paint ready for spraying.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: May 28, 1996
    Assignee: DuPont Canada, Inc.
    Inventor: Tong Z. Liu