Patents by Inventor Charles G. Dewitt

Charles G. Dewitt 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).

  • Patent number: 6200492
    Abstract: Polymers that have limiting viscosities, measured in tetrahydrofuran at 20° C., of at least about 200 mL/g and that can be made by addition polymerization of a mixture of monomers containing: A. from 100—about 30 wt % of esters of acrylic acid and methacrylic acid with monohydric saturated aliphatic alcohols which contain from 1-22 C atoms; and B. up to about 70 wt % of monomers selected from the group consisting of: (1) unsaturated aliphatic carboxylic acids with 3-5 C atoms and their amides, (2) styrene and alkylstyrenes with 1-4 C atoms in their alkyl residues, (3) acrylonitrile, (4) vinyl esters of aliphatic C1-18 carboxylic acids, and (5) amino substituted esters of acrylic acid and methacrylic acid with monohydric alcohols having from 2-6 carbon atoms are highly effective anti-sling additives for textile lubricants.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: March 13, 2001
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Ulrich Eicken, Andreas Botulinski, Heidi Fiedler, Manfred Gorzinski, Issac Fleming, Charles G. Dewitt, Jeffrey T. Langley
  • Patent number: 5491026
    Abstract: Process for applying an antistatic finish to synthetic fibers comprising of steps ofapplying to the fibers to be treated a composition comprising at least one salt of a phosphate partial ester containing a C.sub.12 straight chain alkyl group, a lubricant, and an anionic and/or cationic emulsifier; andautoclaving the treated fibers at a temperature in the range of from about 93.degree. to 150.degree. F.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: February 13, 1996
    Assignee: Henkel Corporation
    Inventors: Elbert H. Mudge, Charles G. DeWitt
  • Patent number: 5464678
    Abstract: Process for applying an antistatic finish to synthetic fibers having at least 10 denier per filament comprising of steps of applying to the fibers to be treated a composition comprising at least one salt of a phosphate partial ester containing a C.sub.12 straight chain alkyl group, a lubricant, and an anionic and/or cationic emulsifier; and autoclaving the treated fibers at a temperature in the range of from about 93.degree. to 150.degree. F. The invention also relates to the synthetic fibers so treated.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: November 7, 1995
    Assignee: Henkel Corporation
    Inventors: Elbert H. Mudge, Charles G. DeWitt