Patents by Inventor Alexander Shivanyuk

Alexander Shivanyuk 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).

  • Calixarene derivatives, preparation method and use of said derivatives to extract antinides and lathanides
    Patent number: 6630114
    Abstract: The invention relates to new calixarenes according to the formula: wherein R1 and R2, which may be identical or different, are alkyl, alkoxy or aryl groups, and n is an integer equal to 2, 3 or 4. Said calixarenes may be used to extract actinides and lanthanides from aqueous solutions.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: October 7, 2003
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-François Dozol, Hélène Rouquette, Alejandro Garcia Carrera, Laetitia Delmau, Volker Böhmer, Alexander Shivanyuk, Christian Muzigmann
  • Method for separating actinides and lanthanides by liquid-liquid extraction using calixarenes
    Patent number: 6312653
    Abstract: The invention involves a process for separating actinides and lanthanides by liquid-liquid extraction by means of calixarenes. These calixarenes have the formula: with R1 and R2 being alkyl groups or o-nitrophenoxy alkyl groups and R3 and R4 being aryl groups, and they are used in an organic liquid phase containing an organic diluent. The diluent and the calixarene concentration of the organic phase are chosen so as to ensure an enrichment of the organic phase with the actinide(s) and/or lanthanide(s) to be separated from an aqueous acid or saline solution.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: November 6, 2001
    Assignee: Commissariat A l'Energie Atomique
    Inventors: Laetitia Delmau, Nicole Simon, Jean-François Dozol, Bernard Tournois, Christine Roussin-Bouchard, Serge Eymard, Volker Böhmer, Cordula Grüttner, Alexander Shivanyuk, Christian Musigmann