Patents by Inventor Jurgen Krause

Jurgen Krause 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).

  • Method for manufacturing ether polycarboxylic acids
    Patent number: 3956383
    Abstract: A process for the production of ether polycarboxylic acids comprising reacting alkali metal salts of ether carboxylic acids with carbon dioxide in the presence of (1) an alkali metal alcoholate and (2) optionally, heavy metal catalysts and inert diluents at temperatures of 200.degree.C to 350.degree.C under pressure, acidify the resulting alkali metal salt of an ether polycarboxylic acid and recovering the ether polycarboxylic acid.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: May 11, 1976
    Assignee: Henkel & Cie G.m.b.H.
    Inventors: Horst-Jurgen Krause, Gunther Tischbirek
  • Process for the production of ether polycarboxylic acids
    Patent number: 3956382
    Abstract: A process for the production of ether polycarboxylic acids comprising reacting alkali metal salts of ether carboxylic acids with carbon dioxide in the presence of (1) an alkaline compound selected from the group of alkali metal carbonates, bicarbonates and hydroxides and (2) optionally, heavy metal catalysts and inert diluents at temperatures of 200.degree.C to 350.degree.C under pressure, acidify the resulting alkali metal salt of an ether polycarboxylic acid and recovering said ether polycarboxylic acid.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: May 11, 1976
    Assignee: Henkel & Cie G.m.b.H.
    Inventor: Horst-Jurgen Krause
  • Method for preparation of ether polycarboxylic acids
    Patent number: 3956381
    Abstract: A process for the production of ether polycarboxylic acids comprising reacting alkali metal salts of ether carboxylic acids with carbon dioxide in the presence of (1) an alkali metal alkyl carbonate and (2) optionally, heavy metal catalysts and inert diluents at temperatures of 200.degree.C to 350.degree.C under pressure, acidify the resulting alkali metal salt of an ether polycarboxylic acid and recovering the ether polycarboxylic acid.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: May 11, 1976
    Assignee: Henkel & Cie G.m.b.H.
    Inventor: Horst-Jurgen Krause