Patents by Inventor Willem Klop

Willem Klop 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 oligopeptide or amino acid alkyl ester.HCl salts
    Patent number: 5357043
    Abstract: The invention relates to a process for the preparation of an oligopeptide or amino acid alkyl ester.HCl salt, the alkyl group being methyl, ethyl, isopropyl or n-propyl, by converting an oligopeptide.HCl salt or amino acid.HCl salt with an alkanol corresponding to the alkyl group under the influence of an acid catalyst, 0.01-0.5 mol HCl relative to the oligopeptide.HCl salt or amino acid.HCl salt in combination with an acid ion exchange resin being used as acid catalyst.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: October 18, 1994
    Assignee: Holland Sweetener Company V.O.V.
    Inventors: Hubertus J. A. V. Delahaye, Johan T. Tinge, Adelbert A. H. Drinkenburg, Antonius J. J. M. Teunissen, Willem Klop
  • Process for preparing a 2-alkyl-1,4,5,6-tetrahydropyrimidine
    Patent number: 4880929
    Abstract: The invention relates to a process for preparing a 2-alkyl-1,4,5,6-tetrahydropyrimidine with the formula ##STR1## where R represents a straight or branched chain with 1-8 C-atoms or a phenyl group from 1,3-diaminopropane and an alkanecarboxylic acid, in which the alkyl group of such an acid is the same as the R group described above, wherein the starting materials are reacted in the gas phase in the presence of an oxide catalyst at a temperature of between 250.degree. and 450.degree. C. and from the reaction mixture thus obtained the 2-alkyl-1,4,5,6-tetrahydropyrimidine is recovered.
    Type: Grant
    Filed: September 16, 1987
    Date of Patent: November 14, 1989
    Assignee: Stamicarbon B.V.
    Inventors: Antonius J. J. M. Teunissen, Willem Klop, Hubertus J. A. V. Delahaye