Patents by Inventor Johannes Kioustelidis

Johannes Kioustelidis 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).

  • Aqueous dispersion of gypsum and its use as a filler and coating pigment in the production of paper and cardboard
    Patent number: 4927463
    Abstract: The present invention provides an aqueous dispersion comprising gypsum and a surface-active, anionic compound, wherein the surface-active compound is a phosphoric acid ester selected from the group consisting of (1) an acidic phosphoric acid ester of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and are alkyl poly(oxyethylene), alkyl poly(oxypropylene), alkylphenoxy- alkyl or alkylphenyl polyoxyalkyl radicals, (2) a monophosphoric acid ester of a mono- or dihydroxyalkylurea or of an alkoxylated mono- or dihydroxyalkylurea, and (3) a monophosphoric acid ester of a polyalkoxylated amine, in which several hydroxyl groups can be esterified with phosphoric acid.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: May 22, 1990
    Assignee: Biochemie Ladenburg GmbH
    Inventors: Erhard Kloetzer, Johannes Kioustelidis, Guenter Schmidt
  • Process of producing alkali metal or ammonium citrates
    Patent number: 3944606
    Abstract: Alkali metal or ammonium citrates are produced from solutions of citric acid obtained by chemical reaction or by fermentation by extraction by means of a specific water-immiscible mixture of aliphatic amines and organic solvents and re-extracting the resulting organic solvent mixture with an aqueous solution of an alkali metal hydroxide, carbonate or bicarbonate, ammonia, or their salts.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: March 16, 1976
    Assignee: Joh. A. Benckiser GmbH
    Inventors: Manfred Rieger, Johannes Kioustelidis