Patents by Inventor Jean-François Dozol

Jean-François Dozol 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).

  • Phosphorus dendrimers, preparation method thereof and use of same for the extraction of actinides and lanthanides
    Patent number: 7763684
    Abstract: The invention relates to novel phosphorus-containing dendrimers having a core, at least one generation and an external layer consisting, completely or partly, of identical or different units, the said units satisfying the following formula (I): in which R1 and R2, which may be identical or different, are alkyl, alkoxy or aryl groups. These dendrimers are used for extracting actinides and lanthanides from aqueous solutions containing them.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: July 27, 2010
    Assignee: Commissariat a l 'Energie Atomique
    Inventors: Jean-François Dozol, Christian Schmidt, Pingshan Wang, Volker Bohmer
  • Phosphorours dendrimers, preparation method thereof and use of same for the extraction of actinides and lanthanides
    Publication number: 20060205920
    Abstract: The invention relates to novel phosphorus-containing dendrimers having a core, at least one generation and an external layer consisting, completely or partly, of identical or different units, the said units satisfying the following formula (I): in which R1 and R2, which may be identical or different, are alkyl, alkoxy or aryl groups. These dendrimers are used for extracting actinides and lanthanides from aqueous solutions containing them.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 14, 2006
    Inventors: Jean-Francois Dozol, Christian Schmidt, Pingshan Wang, Volker Bohmer
  • Calixarene acetamido derivatives, preparation and use thereof for extracting strontium
    Patent number: 6709642
    Abstract: The invention concerns derivatives of calixarene having the formula: in which: R1 represents various hydrocarbon groups, R2 and R3 represent an alkyl, cycloalkyl or aryl group or a group having the formula: O(CH2)n[O(CH2)p]q OR4, or form a heterocyclic group with the nitrogen atom, and, n equals 6, 7 or 8. These derivatives can be used for extracting strontium from aqueous solutions.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: March 23, 2004
    Assignee: Commissariat a l'Energie Atomiguie
    Inventors: Jean-François Dozol, Rocco Ungaro, Alessandro Casnati
  • Calixarene derivatives
    Patent number: 6657081
    Abstract: The invention relates to new calixarenes according to the formula: wherein: R1 is an alkyl or aryl group, or a hydrogen atom, R2 and R3, which may be identical or different, are alkyl or aryl groups, n is an integer ranging from 2 to 8, and p is an integer ranging from 4 to 8. Said calixarenes may be used to extract actinides and lanthanides from aqueous solutions.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: December 2, 2003
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-François Dozol, Alejandro Garcia Carrera, Volker Bohmer, Susan E. Matthews
  • 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
  • Method for separating actinides and lanthanides by membrane transport using a calixarene
    Patent number: 6306355
    Abstract: The invention involves the separation of actinides and lanthanides by membrane transport by means of a calixarene. To this end, a first aqueous solution containing at least one metal from the group of actinides and lanthanides to be separated is placed in the compartment 3 and a second aqueous re-extraction solution such as a 10−2 mol/L solution of HNO3 is placed in the compartment 5. The membrane 6 is a microporous membrane of which the pores are filled with a liquid organic phase (calixarene and diluent) chosen in order to favour membrane transport of the metal(s) to be separated from compartment 3 to compartment 5.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: October 23, 2001
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Laetitia Delmau, Nicole Simon, Jean-François Dozol, Bernard Tournois, Christine Roussin-Bouchard, Volker Böhmer, Ralf A. Jakobi, Oliver Mogck, Abdi Tunayar