Patents by Inventor Chris S. Barnum

Chris S. Barnum 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).

  • Reactive distillation process for free radical halogenation
    Patent number: 5449801
    Abstract: A process for the selective high yield halogenation R--CH.sub.3 wherein R is ##STR1## Si(Cl).sub.m (CH.sub.3).sub.n, wherein m is 1 to 3, n is 1 to 3 and m+n is 3; phenyl; or phenyl substituted with Cl, Br, F, OR.sup.1, SR.sup.1 or NO.sub.2 ; R.sup.1 is C.sub.1 -C.sub.3 alkyl; and X is chlorine or bromine; under reactive distillation conditions which continuously and selectively separate the mono, di, or trihalogenated product from the reaction zone and which does not require recycling of the starting materials is disclosed.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: September 12, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Chris S. Barnum, Charles T. Blaisdell