Patents by Inventor Hendrikus J. H. van der Maas

Hendrikus J. H. van der Maas 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 cobalt (III) acetylacetonate
    Patent number: 4338254
    Abstract: A process for the preparation of cobalt (III) acetylacetonate by oxidation of cobalt (II) acetylacetonate by means of hydrogen peroxide in the presence of the stoichiometrically required amount of acetylacetone in an organic solvent, wherein the organic solvent used is a solvent that is miscible with water and is inert to hydrogen peroxide, and in which the cobalt (II) acetylacetonate was prepared and is present in solution.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: July 6, 1982
    Assignee: Chemische Fabriek Zaltbommel
    Inventor: Hendrikus J. H. van der Maas
  • Process for the preparation of cobalt (II) acetylacetonate
    Patent number: 4337210
    Abstract: An improved process for the preparation of cobalt (II) acetylacetonate by reaction of cobalt (II) compounds with acetylacetone at elevated temperature is disclosed, wherein the reaction is carried out in an organic solvent which is immiscible with water, and forms with water an azeotropic mixture, in the vicinity of the boiling temperature of said azeotropic mixture.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: June 29, 1982
    Assignee: Chemische Fabriek Zaltbommel
    Inventor: Hendrikus J. H. van der Maas