Patents by Inventor Wilhelm Striepe

Wilhelm Striepe 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).

  • Preparation of indanes
    Patent number: 4740646
    Abstract: Indanes are prepared by reacting substituted or unsubstituted benzyl halides with olefins in the presence of a Lewis acid as catalyst by reacting benzyl halides I ##STR1## (where R.sup.1 and R.sup.2 =hydrogen, alkyl, alkoxy, cycloalkyl, aryl, aryloxy, aralkylR.sup.3 =R.sup.1, halogen or an ortho-fused ring systemX=halogen)with olefins II ##STR2## (where R.sup.4 to R.sup.7 =hydrogen or alkyl unbranched at alpha) in the presence of catalytic amounts of titanium tetrachloride.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: April 26, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Erhard Henkes, Klaus Halbritter, Herbert Mayr, Wilhelm Striepe, Rudolf Pock