Patents by Inventor Chris M. Arizo

Chris M. Arizo 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).

  • Toluene sulfonic acid swelling of perylene pigments
    Patent number: 6464773
    Abstract: A method of acid swelling crude perylene pigment by treating the crude with about 2 to 10 parts by weight of toluene sulfonic acid at an elevated pressure and at temperatures ranging from 40 to 140° C.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: October 15, 2002
    Assignee: Sun Chemical Corporation
    Inventors: Edward H. Sung, George H. Robertson, Chris M. Arizo