Patents by Inventor Guido Kalin

Guido Kalin 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 hydroxyphenylpropionates
    Patent number: 5177247
    Abstract: Hydroxyphenylpropionates of formula ##STR1## wherein R.sub.1 to R.sub.4 are as defined in claim 1, are prepared by reacting the appropriate phenol and acrylate components in the presence of the sodium and potassium salt of said phenol component.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: January 5, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Franz Brogli, Guido Kalin