Patents by Inventor Patrick H. M. Hendriks

Patrick H. M. Hendriks 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 an aromatic bisoxazoline
    Patent number: 6660869
    Abstract: The invention relates to a process for the preparation of an aromatic bisoxazoline in which, in a first step, an aromatic carboxylic acid or an ester hereof reacts with an alkanolamine, after which the hydroxyalkylamide obtained is in a second step converted into an aromatic bisoxazoline in the presence of a catalyst. The catalyst is phosphinic acid, a (C1-C26) alkyl phosphinic acid, a (C6-C20)aryl phosphinic acid or an ester or an anhydride derived from one of these acids.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: December 9, 2003
    Assignee: DSM N.V.
    Inventors: Rudolfus A. T. M. Van Benthem, Jacobus A. Loontjens, Patrick H. M. Hendriks, Bartholomeus J. M. Plum