Patents by Inventor Jurg Bruhin

Jurg Bruhin 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).

  • Process for the preparation of benzophenone derivatives
    Patent number: 5877353
    Abstract: The present invention relates to a process for the preparation of benzophenone derivatives and comprises a selective crystallization of alkali salts of compounds of formula (I) ##STR1## wherein R.sup.1 is lower-alkyl and R.sup.2 is hydrogen, lower-alkyl or halogen,from the isomeric alkali salts of the 3-hydroxy compounds of formula (II), ##STR2## wherein R.sup.1 and R.sup.2 are as defined above.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: March 2, 1999
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Jurg Bruhin