Patents by Inventor Mike Friswell

Mike Friswell 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).

  • N,N-dialkylaniline azo dye solutions
    Patent number: 6083285
    Abstract: A stabilized, concentrated solution of a diazo dye is prepared by coupling diazotized aniline or substituted aniline with a dialkylaniline in the presence of an aromatic solvent. After removal of the aqueous phase, the solution is stabilized by the addition of a branched chain, primary or secondary, C.sub.3 -C.sub.6 alkyl phenol.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: July 4, 2000
    Assignee: Morton International, Inc.
    Inventors: Mike Friswell, Justin Frederico, Haresh Doshi