Patents by Inventor Frederic Leroux

Frederic Leroux 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).

  • Patent number: 12397283
    Abstract: The invention discloses a functionalised chromatography medium, comprising: i) at least one non-woven layer of polymeric nanofibres comprising a plurality of nanofibre-nanofibre fusion points; ii) a grafted polymer coating covering the polymeric nanofibres and the nanofibre-nanofibre fusion points; iii) a plurality of ligand groups covalently bound to the grafted polymer coating, wherein the ligand groups are capable of interacting with a target biomolecule.
    Type: Grant
    Filed: February 12, 2024
    Date of Patent: August 26, 2025
    Assignee: CYTIVA BIOPROCESS R&D AB
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Howard Albert Law
  • Publication number: 20250256263
    Abstract: The invention discloses a functionalised chromatography medium, comprising: i) at least one non-woven layer of polymeric nanofibres comprising a plurality of nanofibre-nanofibre fusion points; ii) a grafted polymer coating covering the polymeric nanofibres and the nanofibre-nanofibre fusion points; iii) a plurality of ligand groups covalently bound to the grafted polymer coating, wherein the ligand groups are capable of interacting with a target biomolecule.
    Type: Application
    Filed: February 12, 2024
    Publication date: August 14, 2025
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Howard Albert Law
  • Publication number: 20250153140
    Abstract: A chromatography medium is provided, comprising a matrix of cellulose-based nanofibers, the nanofibers optionally being crosslinked to one another. A ligand coupled to the matrix without any intermediate extender group. Also provided is a method of preparing a functionalised chromatography medium. The method comprises: (i) providing a substrate comprising cellulose acetate; (ii) forming a fibrous matrix/membrane spun of nanofibers from the substrate; (iii) saponification of the nanofibers to form regenerated cellulose nanofibers; (iv) derivatisation of the regenerated cellulose nanofibers with a cross-linker, and (v) coupling of a ligand to the derivatised cellulose nanofibers, wherein the preparation of the functionalised chromatography medium does not comprise any surface extender. The chromatography medium is useful for separation of large analytes, such as viruses.
    Type: Application
    Filed: February 16, 2023
    Publication date: May 15, 2025
    Inventors: Jean-Luc Maloisel, Frederic Leroux, Lisa Marx
  • Publication number: 20240261705
    Abstract: An anion exchange chromatography medium (1) for use in purification of enveloped virus particles or exosomes from a feed, the anion exchange chromatography medium comprising a support material being functionalized with a ligand comprising a diamine functionality generating at least one weak anion exchange group to an ionic capacity of 10-500 ?mol/mL.
    Type: Application
    Filed: June 27, 2022
    Publication date: August 8, 2024
    Inventors: Jean-Luc Maloisel, Asa Hagner McWhirter, Ola Lind, Frederic Leroux
  • Patent number: 11998890
    Abstract: Functionalised polymeric chromatography medium, comprising: at least one non-woven sheet comprising one or more polymeric nanofibers having a mean diameter of 10-1000 nm; one or more polymer chains grafted onto the one or more polymeric nanofibers, wherein the polymer chains are poly-glycerol chains comprising glycidol monomer residues or wherein the polymer chains comprise divinylsulfone monomer residues; and at least one ligand group bonded to the one or more polymer chains.
    Type: Grant
    Filed: July 15, 2021
    Date of Patent: June 4, 2024
    Assignee: PURIDIFY LTD.
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Law
  • Patent number: 11931719
    Abstract: The invention discloses a functionalised chromatography medium, comprising: i) at least one non-woven layer (10) of polymeric nano fibres (20) comprising a plurality of nanofibre-nano fibre fusion points (30); ii) a grafted polymer coating covering the polymeric nanofibres and the nanofibre-nanofibre fusion points; iii) a plurality of ligand groups covalently bound to the grafted polymer coating, wherein the ligand groups are capable of interacting with a target biomolecule.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: March 19, 2024
    Assignee: PURIDIFY LTD.
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Howard Albert Law
  • Publication number: 20210346866
    Abstract: Functionalised polymeric chromatography medium, comprising: at least one non-woven sheet comprising one or more polymeric nanofibers having a mean diameter of 10-1000 nm; one or more polymer chains grafted onto the one or more polymeric nanofibers, wherein the polymer chains are poly-glycerol chains comprising glycidol monomer residues or wherein the polymer chains comprise divinylsulfone monomer residues; and at least one ligand group bonded to the one or more polymer chains.
    Type: Application
    Filed: July 15, 2021
    Publication date: November 11, 2021
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Law
  • Patent number: 11097252
    Abstract: The present invention provides a functionalised polymeric chromatography medium, prepared by a process which comprises (i) providing a substrate formed of one or more polymer nanofibres, (ii) grafting one or more neutral polymer chains from the substrate, and (iii) contacting the grafted product with a reagent which functionalises the product of step (ii) as a chromatography medium, wherein step (ii) comprises reacting a plurality of compounds of formula and/or its enantiomers, and/or its derivatives of formula (I) and/or enantiomers and/or diastereomers thereof: with one or more functional groups present on the nanofibre substrate, wherein R1, R2, R3, R4 and R5 may be the same or different, and are chosen from H, halogen, C1-C4 alkyl, or C1-C4 alkoxy provided that at least one of R1, R2, R3, R4 or R5 is not hydrogen.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: August 24, 2021
    Assignee: Puridify Ltd.
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Law
  • Publication number: 20210060527
    Abstract: The invention discloses a functionalised chromatography medium, comprising: i) at least one non-woven layer (10) of polymeric nano fibres (20) comprising a plurality of nanofibre-nano fibre fusion points (30); ii) a grafted polymer coating covering the polymeric nanofibres and the nanofibre-nanofibre fusion points; iii) a plurality of ligand groups covalently bound to the grafted polymer coating, wherein the ligand groups are capable of interacting with a target biomolecule.
    Type: Application
    Filed: January 7, 2019
    Publication date: March 4, 2021
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Howard Albert Law
  • Publication number: 20190308169
    Abstract: The present invention provides a functionalised polymeric chromatography medium, prepared by a process which comprises (i) providing a substrate formed of one or more polymer nanofibres, (ii) grafting one or more neutral polymer chains from the substrate, and (iii) contacting the grafted product with a reagent which functionalises the product of step (ii) as a chromatography medium, wherein step (ii) comprises reacting a plurality of compounds of formula and/or its enantiomers, and/or its derivatives of formula (I) and/or enantiomers and/or diastereomers thereof: with one or more functional groups present on the nanofibre substrate, wherein R1, R2, R3, R4 and R5 may be the same or different, and are chosen from H, halogen, C1-C4 alkyl, or C1-C4 alkoxy provided that at least one of R1, R2, R3, R4 or R5 is not hydrogen.
    Type: Application
    Filed: July 14, 2017
    Publication date: October 10, 2019
    Inventors: Marc Hummersone, Benjamin Wallis, Frederic Leroux, William Law
  • Patent number: 9707553
    Abstract: P-chirogenic organophosphorus compounds of general formula (I), a process for the synthesis of the compounds of formula (I), and intermediate products of general formulae (II), (III) and (IV), as shown below, are involved in the synthesis of compounds (I). Metal complexes comprising compounds (I) as ligands are also described. The compounds and complexes are useful in asymmetric catalysis by transition metal complexes or organocatalysis, especially for asymmetric hydrogenation or allylation. Compounds of general formula (I) may be useful as agrochemical and therapeutic substances, or as reagents or intermediates for fine chemistry.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: July 18, 2017
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITE DE BOURGOGNE, UNIVERSITE DE STRASBOURG, SYNTHELOR SAS
    Inventors: Sylvain Juge, Jerome Bayardon, Emmanuelle Remond, Hugo Laureano, Jean-Christophe Henry, Frederic Leroux, Francoise Colobert
  • Publication number: 20160023199
    Abstract: Novel P-chirogenic organophosphorus compounds of general formula (I), a process for the synthesis of the compounds of formula (I), and intermediate products of general formulae (II), (III) and (IV), as shown below, are involved in the synthesis of compounds (I). Metal complexes including compounds (I) as ligands are also described. The novel compounds and complexes are useful in asymmetric catalysis by transition metal complexes or organocatalysis, especially for asymmetric hydrogenation or allylation. Compounds of general formula (I) may be useful as agrochemical and therapeutic substances, or as reagents or intermediates for fine chemistry.
    Type: Application
    Filed: October 6, 2015
    Publication date: January 28, 2016
    Inventors: Sylvain JUGE, Jerome BAYARDON, Emmanuelle REMOND, Hugo LAUREANO, Jean-Christophe HENRY, Frederic LEROUX, Francoise COLOBERT
  • Patent number: 9186661
    Abstract: Novel P-chirogenic organophosphorus compounds of general formula (I), a process for the synthesis of the compounds of formula (I), and intermediate products of general formulae (II), (III) and (IV), as shown below, are involved in the synthesis of compounds (I). Metal complexes including compounds (I) as ligands are also described. The novel compounds and complexes are useful in asymmetric catalysis by transition metal complexes or organocatalysis, especially for asymmetric hydrogenation or allylation. Compounds of general formula (I) may be useful as agrochemical and therapeutic substances, or as reagents or intermediates for fine chemistry.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: November 17, 2015
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITE DE BOURGOGNE, UNIVERSITE DE STRASBOURG, SYNTHELOR SAS
    Inventors: Sylvain Juge, Jerome Bayardon, Emmanuelle Remond, Hugo Laureano, Jean-Christophe Henry, Frederic Leroux, Francoise Colobert
  • Publication number: 20140142325
    Abstract: Novel P-chirogenic organophosphorus compounds of general formula (I), a process for the synthesis of the compounds of formula (I), and intermediate products of general formulae (II), (III) and (IV), as shown below, are involved in the synthesis of compounds (I). Metal complexes including compounds (I) as ligands are also described. The novel compounds and complexes are useful in asymmetric catalysis by transition metal complexes or organocatalysis, especially for asymmetric hydrogenation or allylation. Compounds of general formula (I) may be useful as agrochemical and therapeutic substances, or as reagents or intermediates for fine chemistry.
    Type: Application
    Filed: July 10, 2012
    Publication date: May 22, 2014
    Applicant: Centre National de la Recherche Scientifique(CNRS)
    Inventors: Sylvain Juge, Jerome Bayardon, Emmanuelle Remond, Hugo Laureano, Jean-Christophe Henry, Frederic Leroux, Francoise Colobert
  • Publication number: 20120214996
    Abstract: Dibenzylidene and heterobenzylideneacetone derivatives, related 4-piperidones, related 4-thiopyranones and the corresponding sulfinyl- and sulfonyl-analogues for their use for prophylaxis or treatment of trypanosomiasis and leishmaniasis.
    Type: Application
    Filed: September 20, 2010
    Publication date: August 23, 2012
    Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Elisabeth Davioud-Charvet, Ingrid Nicole Wenzel, Thomas J.J. Muller, Gilles Hanquet, Don Antoine Lanfranchi, Frederic Leroux, Thibault Gendron
  • Patent number: 7629776
    Abstract: A control and power module for a rotating electrical machine comprising a power circuit containing a number of branches, and a control circuit designed for controlling the power circuit when the machine operates in a nominal mode. The inventive module is characterized in that the control circuit is also designed for monitoring an output voltage from the power circuit and blocking at least one branch of the power circuit in a conduction state when the output voltage reaches an at least first threshold value so that the machine functions in a degraded mode. The invention is for use in an alternator starter.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: December 8, 2009
    Assignee: Valeo Equipments Electriques Moteur
    Inventors: Michael Chemin, Francois-Xavier Bernard, Frederic Leroux
  • Publication number: 20090105505
    Abstract: A process for the preparation of asymmetrically substituted biaryldiphosphine ligands of the formula: wherein R1 is C1-6-alkyl or C3-10-cycloalkyl optionally being substituted with one or more halogen atoms, and R2 and R3 are equal and are C5-10-cycloalkyl and C1-6-alkyl, or R2 is C5-10-cycloalkyl or C1-6-alkyl, and R3 is aryl optionally substituted with one or more substituents selected from the group consisting of halogen atoms, nitro, amino, C1-6-alkyl, C1-6-akoxy and di-C1-6-alkylamino groups,2 and each C1-6-alkyl, C1-6-alkoxy, di-C1-6-alkylamino and C5-10-cycloalkyl group in R2 and R3 is optionally substituted with one or more halogen atoms, from 2,2?,6,6?-tetrabromobiphenyl by a sequence of bromine-metal exchanges and subsequent reactions.
    Type: Application
    Filed: June 6, 2005
    Publication date: April 23, 2009
    Applicant: LONZA AG
    Inventors: Hanspeter Mettler, Frederic Leroux, Manfred Schlosser
  • Publication number: 20090018133
    Abstract: The invention provides compounds of formula (I), in which m, A, R1 and Ar have the meanings defined in the specification; processes for their preparation; pharmaceutical compositions containing them; a process for preparing the pharmaceutical compositions; and their use in therapy.
    Type: Application
    Filed: February 29, 2008
    Publication date: January 15, 2009
    Inventors: Rhonan Ford, Frederic Leroux, Michael Stocks
  • Publication number: 20080309266
    Abstract: A device for determining the position of the rotor of a rotating electrical machine. The invention is characterized in that the device comprises a plurality of magnetic field sensors stationary relative to the stator and adapted to deliver multiphase electric signals representing a magnetic field detected by the sensors, and means for processing the multiphase electric signals by an operator capable of providing diphase signals depending on the position of the rotor. The invention is applicable to rotating electrical machines used in the automotive industry.
    Type: Application
    Filed: June 30, 2005
    Publication date: December 18, 2008
    Applicant: VALEO EQUIPEMENTS ELECTRIQUES MOTEUR
    Inventors: Michael Chemin, Frederic Leroux, Gilbert Konan
  • Publication number: 20080312854
    Abstract: A method and system for measuring electric current in a plurality (n) of conductors. According to the invention, the method comprises the following steps: an electric current transducer is place substantially opposite to each conductor (I, i=1, . . . , n); a decorrelation matrix ([G]), which is a function of the position of the transducers in relation to the conductors, is constructed; the current (Imesi) in each conductor (i) is measured with the aid of electric current transducers and real currents (Ireeli) are deduced with the aid of the decorrelation matrix ([G]) and the measured currents (Imesi).
    Type: Application
    Filed: June 30, 2005
    Publication date: December 18, 2008
    Applicant: VALEO EQUIPEMENTS ELECTRIQUES MOTEUR
    Inventors: Michael Chemin, Frederic Leroux, Francois-Xavier Bernard