Patents by Inventor Paul B. Cao

Paul B. Cao 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).

  • BiOCl pigment
    Patent number: 6582507
    Abstract: A bismuth oxychloride effect pigment has a zinc oxide or microfine titanium dioxide particulate at about the surface of the crystals of the bismuth oxychloride. The pigment is prepared by, for instance, growing the bismuth oxychloride crystals, and adding the particulate before the hydrolysis is complete.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: June 24, 2003
    Assignee: Engelhard Corporation
    Inventors: Paul B. Cao, Michael Venturini
  • BiOCI pigment
    Patent number: 6572695
    Abstract: A bismuth oxychloride effect pigment has a carbon black particulate at about the surface of the crystals of the bismuth oxychloride. The pigment is prepared by, for instance, growing the bismuth oxychloride crystals, and adding the particulate before the hydrolysis is complete.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: June 3, 2003
    Assignee: Engelhard Corporation
    Inventor: Paul B. Cao