Patents by Inventor Hans F. Vanbrackle

Hans F. Vanbrackle 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).

  • Halogenation of star-branched butyl rubber with improved neutralization
    Patent number: 5286804
    Abstract: A process for halogenating star-branched butyl rubber is provided wherein water and a wetting agent or wetting agent precursor are added to a solution comprising the star-branched butyl rubber, solid particles of branching agent and an organic solvent prior to the neutralization step to increase the rate of neutralization of the hydrogen halide by-product of the halogenation reaction.
    Type: Grant
    Filed: September 17, 1991
    Date of Patent: February 15, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Kenneth W. Powers, Hsien C. Wang, Robert N. Webb, James V. Fusco, Hans F. Vanbrackle, Michael F. McDonald, Jr.