Patents by Inventor Jozef M. J. Mattheij

Jozef M. J. Mattheij 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).

  • Reagent for the quantitative determination of water and its use therefor
    Patent number: 4385124
    Abstract: Reagent for the quantitative determination of water, used together with an iodine-containing titrating solution, the reagent being free of pyridine and containing sulfur dioxide and an anhydrous alkali metal salicylate in methanol, 2-methoxyethanol or a mixture thereof in a volume ratio of at most 90 : 10 when a mixture of methanol and 2-methoxyethanol is used, which has been neutralized with an aliphatic amine for stabilizing the pH value.This reagent is distinguished in that the increase of the blind value is restricted to a very low value even at elevated temperatures.
    Type: Grant
    Filed: January 13, 1982
    Date of Patent: May 24, 1983
    Assignee: J. T. Baker Chemicals B.V.
    Inventors: Antonie E. Verbeek, Jozef M. J. Mattheij
  • Reagent for the quantitative determination of water and its use therefor
    Patent number: 4355998
    Abstract: A reagent for the quantitative determination of water, used together with an iodine-containing titrating solution, the reagent containing sulfur dioxide and an anhydrous alkali metal trimethyl acetate or a mixture of anhydrous alkali metal trimethyl acetate and an anhydrous alkali metal salicylate dissolved in 2-methoxy ethanol, methanol or in a mixture of 2-methoxy ethanol and methanol in a volume ratio of at least 10 to 90. This reagent is distinguished in that the increase of the blind value is minimized even at elevated temperatures.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: October 26, 1982
    Assignee: J. T. Baker Chemicals B.V.
    Inventors: Antonie E. Verbeek, Jozef M. J. Mattheij
  • Reagent for the quantitative determination of water
    Patent number: 4295990
    Abstract: A reagent for the quantitative determination of water in combination with a titration solution containing iodine is described. The reagent contains sulfur dioxide and an anhydrous alkali metal acetate in 2-methoxy ethanol or a mixture of 2-methoxy ethanol and methanol in a volume ratio of at least 10:90. The reagent is characterized in that when it is left to stand no precipitate forms and the increase in control value is kept to a minimum.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: October 20, 1981
    Assignee: J. T. Baker Chemicals B.V.
    Inventors: Antonie E. Verbeek, Jozef M. J. Mattheij