Patents by Inventor Johan Kamphuis

Johan Kamphuis 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 N-hydroxy-alpha-amino acid amides
    Patent number: 5101036
    Abstract: The invention relates to a process for the preparation of N-hydroxy-alpha-amino acids and the derivatives thereof by reacting a derivative of an alpha-amino acid with an aromatic aldehyde to form a Schiff base, oxidizing the Schiff base to an oxaziridine and converting the oxaziridine into the corresponding N-hydroxy-alpha-amino acid derivative and, if so desired, converting that derivative into the acid or a different derivative, in which an alpha-amino acid amide is used as starting material.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: March 31, 1992
    Assignee: Stamicarbon B.V.
    Inventors: Johan Kamphuis, Wilhelmus H. J. Boesten
  • Optically active N-hydroxy-alpha-amino acids, amides and their derivatives
    Patent number: 5072041
    Abstract: The invention relates to new pure D- or L-N-hydroxy-alpha-amino acids and the derivatives thereof, including optically active N-hydroxy-phenylglycine amide, which has antibiotic and antitumor activity.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: December 10, 1991
    Assignee: Stamicarbon B.V.
    Inventors: Johan Kamphuis, Wilhelmus H. J. Boesten