Patents by Inventor Joachim H. G. Steinke

Joachim H. G. Steinke 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).

  • Metalation and functionalization of polymers and copolymers
    Patent number: 5840810
    Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Na, K, Rb, Cs alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to the metalated polymer solution; also provided are the metalated copolymers and the functionalized derivatives therefrom.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: November 24, 1998
    Assignees: Exxon Chemical Patents Inc, Cornell Research Foundation Inc.
    Inventors: Jean M. J. Frechet, Shah A. Haque, Joachim H. G. Steinke, Hsien-Chang Wang