Patents by Inventor Antoon Van Harrewijn

Antoon Van Harrewijn 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).

  • Stable topical retinoid compositions
    Patent number: 5690923
    Abstract: Compositions for topical application to the skin are provided, which compositions comprise a retinoid in an aqueous vehicle, and further contain at least one non-ionic surfactant, wherein the non-ionic surfactant is the crystallization-preventing and stabilizing agent for said retinoid and is selected from the group consisting of polyoxyethylene mono fatty alcohol ethers, polyoxyethylene glyceryl fatty acid triesters and ethyleneoxide/propyleneoxide block copolymers.
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: November 25, 1997
    Assignee: Yamanouchi Europe B.V.
    Inventors: Tom DeVringer, Antoon Van Harrewijn, Aart Muehlenbruch
  • Antibacterial 1,2,4-oxadiazolylacetamido cephalosporins
    Patent number: 4160829
    Abstract: 1,2,4-Oxadiazolylacetic acid derivatives. The derivatives include penicillin and cephalosporin amides which have antibiotic properties.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: July 10, 1979
    Assignee: Gist-Brocades N.V.
    Inventors: Robert Heijboer, Antoon VAN Harrewijn, Peter W. Henniger
  • Process for the preparation of heterocyclic compounds
    Patent number: 4024129
    Abstract: A process for the preparation of acylamido derivatives by reaction of a compound of the formula Z - N = C = O, wherein Z is an optionally substituted alkyl-, aryl- (preferably phenyl or naphthyl) or cycloalkyl or optionally substituted heterocyclic, preferably a penicillanic acid or a cephalosporanic acid nucleus, having carboxyl groups and an optionally present hydroxy group protected, with a carboxylic acid of the formula ##STR1## wherein Z.sup.1 is an optionally substituted hydrocarbon group, in the presence of a catalyst selected from the group consisting of substituted pyridines and their N-oxides, optionally substituted imidazoles or their N-oxides, optionally substituted benzimidazoles or their N-oxides, and optionally substituted imidazo [1,2-.alpha.] pyridines or their N-oxides.
    Type: Grant
    Filed: November 3, 1971
    Date of Patent: May 17, 1977
    Assignee: Gist-Brocades N.V.
    Inventors: Peter Wolfgang Henniger, Antoon Van Harrewijn