Patents by Inventor Brian D. Teunis

Brian D. Teunis 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).

  • Rigmentary salt of a triphenylmethane compound and process for making same
    Patent number: 4944806
    Abstract: Pigmentary Opal Sulfate is made by combining triphenylpararosaniline (Opal Blue) with a dilute acid. The pigmentary Opal Sulfate is a substitute for Alkali Blue. The most preferred process for producing the pigmentary Opal Sulfate involves drowning a solution of Opal Blue in a highly agitated solution of dilute sulfuric acid.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: July 31, 1990
    Assignee: BASF Corporation
    Inventors: Anand S. G. Sharangpani, Floyd G. Spence, Brian D. Teunis