Patents by Inventor Timothy B. Gunnell

Timothy B. Gunnell 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).

  • Poly(oxyalkylene) substituted xanthene colorant and method for making the same
    Patent number: 5331097
    Abstract: A diamino-xanthene colorant is provided having the following structure: ##STR1## where Y is a poly(oxyalkylene) substituent having a straight or branched polymer chain of at least 3 monomer units selected from ethylene oxide, propylene oxide, butylene oxide and glycidol;R.sub.1 and R.sub.2 are independently selected from H, C1-C4 alkyl, C1-C4 alkoxy, Cl, Br and I;X is selected from H, SO.sub.3 --, CO.sub.2 -- and COOR.sub.3, where R.sub.3 is C1-C4 alkyl or aryl; andeach Z is independently selected from SO.sub.3 --, CO.sub.2 --, COOR.sub.4, Cl and OH, where R.sub.4 is C1-C4 alkyl or aryl, and n is 0, 1, or 2; the colorant is synthesized by condensing two moles of an N,N-bis(poly(oxyalkylene))-p-methoxyaniline and o-formylbenzene sulfonic acid.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: July 19, 1994
    Assignee: Milliken Research Corporation
    Inventors: Timothy B. Gunnell, John B. Hines, Jr., Carey N. Barry, Jr.