Patents by Inventor Sami Chtourou

Sami Chtourou 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).

  • Publication number: 20130324619
    Abstract: The disclosure relates to uses, methods and compositions for the inactivation of pathogens in biological compositions, using a glycol as a pathogen inactivating agent.
    Type: Application
    Filed: December 23, 2011
    Publication date: December 5, 2013
    Applicant: Laboratoire Francais du Fractionnement et des Biotechnologies
    Inventor: Sami Chtourou
  • Publication number: 20130143302
    Abstract: A method for purifying GLA-domain coagulation proteins, includes the following steps: a) bringing a sample containing one or more GLA-domain coagulation proteins into contact with an affinity substrate on which nucleic aptamers which bind specifically to the GLA-domain coagulation proteins are immobilized, in order to form complexes between (i) the nucleic aptamers and (ii) the GLA-domain coagulation protein(s), b) releasing the GLA-domain coagulation protein(s) from the complexes formed in step a), and c) recovering the GLA-domain coagulation protein(s) in a purified form.
    Type: Application
    Filed: July 30, 2010
    Publication date: June 6, 2013
    Applicant: LFB BIOTECHNOLOGIES
    Inventors: Gerald Perret, Sami Chtourou, Nicolas Bihoreau
  • Patent number: 8388954
    Abstract: This invention is related to a stabilizing formulation for immunoglobulins G compositions comprising a sugar alcohol, glycine and a non-ionic detergent, which is suitable for the stabilization of immunoglobulins G compositions in liquid form and in lyophilized form. The invention also relates to an immunoglobulins G composition in liquid form or in lyophilized form comprising said stabilizing formulation.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: March 5, 2013
    Assignee: Laboratoire Francais du Fractionnement et des Biotechnologies
    Inventors: Annie Bardat, Edith Begin, Nassirah Khandoudi, Olivier Just, Sami Chtourou, Roland Schmitthaeusler
  • Publication number: 20110162094
    Abstract: Modified factors VII/VIIa with a high stability, nucleic acids encoding such modified factors VII/VIIa, and methods of preparing the same.
    Type: Application
    Filed: June 12, 2008
    Publication date: June 30, 2011
    Applicant: LFB BIOTECHNOLOGIES
    Inventors: Emmanuel Nony, Sami Chtourou, Nicolas Bihoreau
  • Patent number: 7888476
    Abstract: This invention relates to a process for the preparation of a very high purity von Willebrand factor concentrate from a biological fraction containing von Willebrand factor, including a separation by anion exchange chromatography using a vinyl polymer support of weak base type, the separation comprising the steps of loading of the chromatographic support with the fraction containing von Willebrand factor, previously equilibrated with a suitable buffer, with a predetermined flowrate allowing the retention of the von Willebrand factor, washing of the support with an acidic buffer with a flowrate higher than the flowrate of the step a) until the not-retained proteins and the contaminants are removed, flushing and equilibrating of the chromatographic support with the buffer and using the flowrate of the step a), and elution of the von Willebrand factor by increasing of the ionic strength of the step c).
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: February 15, 2011
    Assignee: Laboratoire Francais du Fractionnement Et des
    Inventors: Serge Martel, Sami Chtourou, Michel Poulle
  • Publication number: 20100197578
    Abstract: There is provided in accordance with the practice of this invention a demannosylated Factor VIII, the immunogenicity of which is substantially decreased or abolished in Human. The modified factor VIII is disclosed together with the modified amino acid sequence, changed by at least one substitution. The modified factor VIII is useful for hemophiliacs, either to avoid or prevent the action of inhibitory anti-FVIII antibodies.
    Type: Application
    Filed: April 21, 2008
    Publication date: August 5, 2010
    Applicants: LFB Biotechnologies, Institut National De La Sante Et De La Recherche Medicale-Inserm
    Inventors: Abdessatar Sami Chtourou, Sébastien Lacroix-Desmazes, Srinivas Kaveri, Suryasarathi Dasgupta, Jagaadeesh Bayry
  • Patent number: 7760828
    Abstract: An iterative decoding and equalizing device for high bit rate communication over frequency-selective channels with multiple transmit and receive antennas, said device including a decision feedback equalizer adapted to receive data from different receive antennas and including a forward filter (9) and a recursive backward filter (12) fed with calculated weighted reconstituted data from the output of a decoder (13) fed by decision means (11) and means for subtracting the output of said backward filter (12) from the output data of the forward filter (9) whereby the subtracted data is fed to the input of the decision means (11) with the output of the decoder (13) and the decision means (11) produce a statistic which is forwarded to a channel decoder with weighted inputs and outputs and said decision means (11) take into account the space noise correlation at the output of the subtraction means (10) and the decision means (11) and the decoder (13) are separated by space-time interleaving at bit level, which device
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: July 20, 2010
    Assignee: France Telecom
    Inventors: Raphaël Visoz, Sami Chtourou, Antoine Berthet
  • Publication number: 20090311239
    Abstract: The invention is related to a composition of recombinant or transgenic Factor VII, each molecule of Factor VII of the composition exhibiting two N-glycosylation sites, wherein, among all the molecules of FVII of the composition, the rate of Gal?1,3Gal glycan moieties is comprised between 0 and 4%.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 17, 2009
    Applicant: LFB Biotechnologies
    Inventors: Abdessatar Sami Chtourou, Emmanuel Nony, Nicolas Bihoreau
  • Publication number: 20090239788
    Abstract: The present invention concerns a recombinant or transgenic factor VII compound, each factor VII molecule of the compound having glycan forms linked to N-glycosylation sites, wherein among all the factor VII molecules in said compound, glycan, biantennary, bisialylated and non-fucosylated forms are in the majority. The invention also concerns such a compound for use as a medication, and a method for preparing said compound, among others.
    Type: Application
    Filed: July 31, 2007
    Publication date: September 24, 2009
    Applicant: LFB Biotechnologies
    Inventors: Abdessatar Sami Chtourou, Emmanuel Nony, Nicolas Bihoreau
  • Publication number: 20080318841
    Abstract: The invention relates to the use of a factor H for producing a drug for treating Uremic Haemolytic Syndrome (UHS), to a method for purifying the factor H from a frozen fresh plasma and to a factor H concentrate obtainable by said method.
    Type: Application
    Filed: December 7, 2006
    Publication date: December 25, 2008
    Applicant: Laboratoire Francais Du Fractionnement Et Des Biotechnologies S.A.
    Inventors: Abdessadar Sami Chtourou, Claudine Mazurier, Michel Poulle, Bernadette Cauvin, Frederic Dhainault
  • Publication number: 20070161122
    Abstract: The invention relates to an albumin-purification method comprising a step consisting in subjecting an aqueous albumin solution, with a concentration of between 15 g/l and 80 g/l and a pH of not less than 7, to nanofiltration in a temperature range of between 15 DEG C. and 55 DEG C. The invention also relates to: a virally-safe aqueous albumin solution which can be obtained using the invention method and in which the sites for the transport and binding of the active therapeutic ingredients of the albumin are available; and an albumin composition for therapeutic use, which is obtained by adapting the albumin solution that is intended for clinical use.
    Type: Application
    Filed: February 23, 2005
    Publication date: July 12, 2007
    Applicant: Laboratoire Francais Du Fractionnement Et Des Biotechnologies
    Inventors: Paul Boulange, Sami Chtourou, Stephane Boyer, Roland Schmitthaeusler, Bruno Padrazzi
  • Patent number: 7186410
    Abstract: The invention concerns a method for preparing human immunoglobulin concentrates for therapeutic use, from plasma or a plasma fraction. The method comprises pre-purification and a single anion-exchange chromatography carried out at alkaline pH, thereby enabling the immunoglobulins to be retained on the chromatographic support and fractionated. The method enables to obtain IgG, IgA and IgM concentrates.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: March 6, 2007
    Assignee: Laboratoiore Francais du Fractionnement et des Biotechnologies
    Inventors: Abdessatar Sami Chtourou, Philippe Paolantonacci, Roland Schmitthaeusler, Jacky Lirochon
  • Publication number: 20070036779
    Abstract: This invention is related to a stabilising formulation for immunoglobulins G compositions comprising a sugar alcohol, glycine and a non-ionic detergent, which is suitable for the stabilization of immunoglobulins G compositions in liquid form and in lyophilised form. The invention also relates to an immunoglobulins G composition in liquid form or in lyophilised form comprising said stabilising formulation.
    Type: Application
    Filed: April 8, 2004
    Publication date: February 15, 2007
    Inventors: Annie Bardat, Edith Begin, Nassirah Khandoudi, Olivier Just, Sami Chtourou, Roland Schmitthaeusler
  • Publication number: 20060251164
    Abstract: An iterative decoding and equalizing device for high bit rate communication over frequency-selective channels with multiple transmit and receive antennas, said device including a decision feedback equalizer adapted to receive data from different receive antennas and including a forward filter (9) and a recursive backward filter (12) fed with calculated weighted reconstituted data from the output of a decoder (13) fed by decision means (11) and means for subtracting the output of said backward filter (12) from the output data of the forward filter (9) whereby the subtracted data is fed to the input of the decision means (11) with the output of the decoder (13) and the decision means (11) produce a statistic which is forwarded to a channel decoder with weighted inputs and outputs and said decision means (11) take into account the space noise correlation at the output of the subtraction means (10) and the decision means (11) and the decoder (13) are separated by space-time interleaving at bit level, which device
    Type: Application
    Filed: August 6, 2004
    Publication date: November 9, 2006
    Applicant: France Telecom
    Inventors: Raphaël Visoz, Sami Chtourou, Antoina Berthet
  • Publication number: 20060036081
    Abstract: This invention relates to a process for the preparation of a very high purity von Willebrand factor concentrate from a biological fraction containing von Willebrand factor, including a separation by anion exchange chromatography using a vinyl polymer support of weak base type, the said separation comprising the steps of loading of the chromatographic support with the fraction containing von Willebrand factor, previously equilibrated with a suitable buffer, with a predetermined flowrate allowing the retention of the von Willebrand factor, washing of the support with an acidic buffer with a flowrate higher than the flowrate of the step a) until the not-retained proteins and the contaminants are removed, flushing and equilibrating of the chromatographic support with the buffer and using the flowrate of the step a), and elution of the von Willebrand factor by increasing of the ionic strength of the step c).
    Type: Application
    Filed: August 12, 2005
    Publication date: February 16, 2006
    Applicant: LABORATOIRE FRANCAIS DU FRACTIONNEMENT ET DES BIOTECHNOLOGIES
    Inventors: Serge Martel, Sami Chtourou, Michel Poulle
  • Publication number: 20040132979
    Abstract: The invention concerns a method for preparing human immunoglobulin concentrates for therapeutic use, from plasma or a plasma fraction. The method comprises pre-purification and a single anion-exchange chromatography carried out at alkaline pH, thereby enabling the immunoglobulins to be retained on the chromatographic support and fractionated. The method enables to obtain IgG, IgA and IgM concentrates.
    Type: Application
    Filed: February 13, 2004
    Publication date: July 8, 2004
    Inventors: Abdessatar Sami Chtourou, Philippe Paolantonacci, Roland Schmitthaeusler, Jacky Lirochon