Patents by Inventor Nils Fredrik Andersson

Nils Fredrik Andersson 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).

  • Chemical and method for chelating metal ions included in water and separating/recovering of formed chelate
    Patent number: 8658814
    Abstract: The present invention relates to a chemical for chelation of metal ions, which are at least bivalent, contained in water and/or water enclosed objects and separation/recovering of formed chelate; the structural formula of which is formula (I) where R in at least one of the positions shown is comprised of a group in the form of a straight or branched hydrocarbon chain having from 9 to 20 carbon atoms, and where appropriate 1-2 hetero atoms, and which is missing in other position(s); and where X in shown positions is in a group in the form of —COOH or its salt; and wherein the chemical can be a racemate, a mixture of enantiomers, or pure enantiomers or where R is missing in all four positions shown X in at least one position is —COOR, —CONHR or —CH2OR or —COR or —CH2OCOR or —CH2OCONHR; and where X in the remaining positions shown is comprised of a group in the form of —COOH or its salt; and wherein the chemical can be a racemate, a mixture of enantiomers, or pure enantiomers.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: February 25, 2014
    Assignee: Chemseq International AB
    Inventors: Hans Magnus Norgren, Nils Fredrik Andersson, Ida Helena Högberg, Kjell Håkan Edlund, Sten Erik Hedenström
  • CHEMICAL AND METHOD FOR CHELATING METAL IONS INCLUDED IN WATER AND SEPARATING/RECOVERING OF FORMED CHELATE
    Publication number: 20110124898
    Abstract: The present invention relates to a chemical for chelation of metal ions, which are at least bivalent, contained in water and/or water enclosed objects and separation/recovering of formed chelate; the structural formula of which is formula (I) where R in at least one of the positions shown is comprised of a group in the form of a straight or branched hydrocarbon chain having from 9 to 20 carbon atoms, and where appropriate 1-2 hetero atoms, and which is missing in other position (s); and where X in shown positions is in a group in the form of —COOH or its salt; and wherein the chemical can be a racemate, a mixture of enantiomers, or pure enantiomers or where R is missing in all four positions shown X in at least one position is —COOR, —CONHR or CH2OR or —COR or —CH2OCOR or —CH2OCONHR; and where X in the remaining positions shown is comprised of a group in the form of —COOH or its salt; and wherein the chemical can be a racemate, a mixture of enantiomers, or pure enantiomers.
    Type: Application
    Filed: June 10, 2009
    Publication date: May 26, 2011
    Inventors: Hans Magnus Norgren, Nils Fredrik Andersson, Ida Helena Hogberg, Kjell Hakan Edlund, Sten Erik Hedenstrom