Patents by Inventor Hassan Ait-Haddou

Hassan Ait-Haddou 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: 10737259
    Abstract: Disclosed is an anion exchange porous medium, e.g., a porous membrane, that includes a porous support and a crosslinked cationic polymer coating disposed thereon, wherein the cationic polymer of the crosslinked cationic polymer coating comprises polymerized monomer (A) and polymerized monomer (B) wherein A and B are as defined herein. Also disclosed are methods of preparing the anion exchange porous medium and of treating a fluid containing a biologic.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: August 11, 2020
    Assignee: Pall Corporation
    Inventors: Frank Onyemauwa, Hassan Ait-Haddou
  • Publication number: 20200070140
    Abstract: Disclosed is an anion exchange porous medium, e.g., a porous membrane, that includes a porous support and a crosslinked cationic polymer coating disposed thereon, wherein the cationic polymer of the crosslinked cationic polymer coating comprises polymerized monomer (A) and polymerized monomer (B) wherein A and B are as defined herein. Also disclosed are methods of preparing the anion exchange porous medium and of treating a fluid containing a biologic.
    Type: Application
    Filed: August 31, 2018
    Publication date: March 5, 2020
    Applicant: Pall Corporation
    Inventors: Frank Onyemauwa, Hassan Ait-Haddou
  • Publication number: 20200070104
    Abstract: Disclosed is a porous medium, e.g., a bead, fiber, or membrane, comprising a porous support and a crosslinked polymer coating, wherein the polymer of the crosslinked polymer coating comprises at least one of polymerized monomer (A), at least one of polymerized monomer (B), at least one of polymerized monomer (C), wherein monomers (A)-(C) are as defined herein. Also disclosed are methods of preparing the porous medium and of treating a fluid containing a desired protein and one or more negatively charged species or of removing metals from organic solvents used in the microelectronics industry.
    Type: Application
    Filed: August 31, 2018
    Publication date: March 5, 2020
    Applicant: Pall Corporation
    Inventors: Frank Onyemauwa, Hassan Ait-Haddou
  • Patent number: 10576431
    Abstract: Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids to remove metal ions using the porous membranes, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, and monomeric unit II is vinylpyridine.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: March 3, 2020
    Assignee: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
  • Patent number: 10518225
    Abstract: Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids to remove metal ions using the porous membranes, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, and monomeric unit II is vinylpyridine.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: December 31, 2019
    Assignee: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
  • Patent number: 10471396
    Abstract: Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids using the porous membranes to remove metal ions, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes polymerized monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, the monomeric unit II is haloalkyl styrene, and optionally wherein the halo group of haloalkyl is replaced with an optional substituent, for example, ethylenediamine tetra acetic acid, iminodiacetic acid, or iminodisuccinic acid.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: November 12, 2019
    Assignee: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
  • Patent number: 10343122
    Abstract: Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids using the porous membranes to remove metal ions, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes polymerized monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, the monomeric unit II is haloalkyl styrene, and optionally wherein the halo group of haloalkyl is replaced with an optional substituent, for example, ethylenediamine tetra acetic acid, iminodiacetic acid, or iminodisuccinic acid.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: July 9, 2019
    Assignee: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
  • Patent number: 10315168
    Abstract: Disclosed are hydrophilic porous PTFE membranes comprising PTFE and an amphiphilic copolymer of the formula (I): wherein Rf, Rh1, Rh2, Y, m, n, and o are as described herein. Also disclosed are a method of preparing hydrophilic porous PTFE membranes and a method of filtering fluids through such membranes.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: June 11, 2019
    Assignee: Pall Corporation
    Inventors: Marcin Stasiak, Hassan Ait-Haddou, Frank O. Onyemauwa, Amarnauth Singh
  • Patent number: 10239023
    Abstract: Disclosed is a self-wetting porous membrane comprising an aromatic hydrophobic polymer such as polysulfone and a wetting agent comprising a copolymer of formula A-B or A-B-A, wherein A is a hydrophilic segment comprising a polymerized monomer of the formula (I): CH2?C(R1)(R2), wherein R1 and R2 are as described herein, and B is polyethersulfone, wherein segments B and A are linked through an oxygen atom. Also disclosed is a method of preparing a self-wetting membrane comprising casting a solution containing an aromatic hydrophobic polymer and the wetting agent, followed by subjecting the cast solution to phase inversion. The self-wetting porous membrane finds use in hemodialysis, microfiltration, and ultrafiltration.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: March 26, 2019
    Assignee: Pall Corporation
    Inventors: Marcin Stasiak, Hassan Ait-Haddou
  • Patent number: 10213750
    Abstract: Disclosed are polymers suitable for hydrophilically modifying the surface of porous fluoropolymer supports, for example, a copolymer of the formula: Also disclosed are a method of preparing the polymers, a method of hydrophilically modifying porous fluoropolymer supports, hydrophilic fluoropolymer porous membranes prepared from the polymers, and a method of filtering fluids through the porous membranes.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: February 26, 2019
    Assignee: Pall Corporation
    Inventors: Khaled Abdel-Hakim Helmy Aamer, Jian Qiu, Hassan Ait-Haddou
  • Patent number: 10130918
    Abstract: Disclosed are fluoropolymers with low CWST values and porous membranes made from the fluoropolymers. The fluoropolymer is made up of polymerized monomeric units of the formula A-X—CH2—B, wherein A is C6F13—(CH2)2, X is O or S, and B is vinylphenyl, and the fluoropolymer has a weight average molecular weight (Mw) of at least 100 Kd and/or a glass transition temperature of at least 33° C. copolymer. The porous membranes are suitable for degassing a variety of fluids.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: November 20, 2018
    Assignee: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou, Ying Labreche
  • Patent number: 9962662
    Abstract: Disclosed is a fluorinated polymer of the formula: R—S—P, wherein R is a fluorocarbyl group, S is sulfur, and P is: (i) polyglycerol; (ii) poly(allyl glycidyl ether); (iii) a copolymer of glycidol and allyl glycidyl ether, the copolymer having one or more allyl groups; or (iv) poly(allyl glycidyl ether) or copolymer of glycidol and allyl glycidyl ether, wherein one more of the allyl groups have been replaced with a functional group as described herein. Also disclosed is a method of preparing the fluorinated polymer. The fluorinated polymer finds use in improving the hydrophilicity of porous hydrophobic membranes such as PTFE and PVDF.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: May 8, 2018
    Assignee: Pall Corporation
    Inventors: Hassan Ait-Haddou, Frank Onyemauwa
  • Publication number: 20180078908
    Abstract: Disclosed are fluoropolymers with low CWST values and porous membranes made from the fluoropolymers. The fluoropolymer is made up of polymerized monomeric units of the formula A-X—CH2—B, wherein A is C6F13—(CH2)2, X is O or S, and B is vinylphenyl, and the fluoropolymer has a weight average molecular weight (Mw) of at least 100 Kd and/or a glass transition temperature of at least 33° C. copolymer. The porous membranes are suitable for degassing a variety of fluids.
    Type: Application
    Filed: September 16, 2016
    Publication date: March 22, 2018
    Applicant: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou, Ying Labreche
  • Publication number: 20180043314
    Abstract: Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids to remove metal ions using the porous membranes, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, and monomeric unit II is vinylpyridine.
    Type: Application
    Filed: August 15, 2016
    Publication date: February 15, 2018
    Applicant: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
  • Publication number: 20180043313
    Abstract: Disclosed are a copolymer, porous membranes made from the copolymer, and a method of treating fluids using the porous membranes to remove metal ions, for example, from fluids originating in the microelectronics industry, wherein the copolymer includes polymerized monomeric units I and II, wherein monomeric unit I is of the formula A-X—CH2—B, wherein A is Rf—(CH2)n, Rf is a perfluoro alkyl group of the formula CF3—(CF2)x—, wherein x is 3-12, n is 1-6, X is O or S, and B is vinylphenyl, the monomeric unit II is haloalkyl styrene, and optionally wherein the halo group of haloalkyl is replaced with an optional substituent, for example, ethylenediamine tetra acetic acid, iminodiacetic acid, or iminodisuccinic acid.
    Type: Application
    Filed: August 15, 2016
    Publication date: February 15, 2018
    Applicant: Pall Corporation
    Inventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
  • Patent number: 9855534
    Abstract: Disclosed is a porous membrane comprising a porous polytetrafluoroethylene (PTFE) substrate and a coating comprising a copolymer of formula (I): H—[—O—CH(Rf)—CH2—]m—[—O—CHM-CH2—]n—[—O—CHL-CH2—]s—OH (I), wherein Rf is perfluoro-substituted alkyl or perfluoro-substituted alkyloxy alkyl; M is —CH2—O—(CH2)3—S—(CHZ)t—Y, wherein Z is hydrogen or —CH2COOH, and for example, Y is —COOH or —SO3H, R is hydrogen or alkyl, L is —CH2—O—CH2—CH?CH2, m and n are each independently from about 10 to about 1000, n:s ranges from 0.3:0.7 to 1:0, and t is 0 or 1. Also disclosed is a method of preparing the porous membrane and a method of filtering a fluid, such as isopropanol, containing dissolved metals at a low concentration by the use of such membrane.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: January 2, 2018
    Assignee: Pall Corporation
    Inventors: Hassan Ait-Haddou, Khaled Abdel-Hakim Helmy Aamer
  • Patent number: 9849428
    Abstract: Disclosed are copolymers suitable for hydrophilically modifying the surface of porous fluoropolymer supports, for example, a copolymer of the formula (I) or (II): wherein Rf, Rh, Ra, Y, m, and n are as described herein. Also disclosed are a method of preparing the copolymers, a method of hydrophilically modifying porous fluoropolymer supports, hydrophilic fluoropolymer porous membranes prepared from the polymers, and a method of filtering fluids through the porous membranes.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: December 26, 2017
    Assignee: Pall Corporation
    Inventors: Marcin Stasiak, Hassan Ait-Haddou
  • Patent number: 9724650
    Abstract: Disclosed are copolymers which are useful in hydrophilically modifying porous fluoropolymer supports. An example of the copolymers is: Also disclosed are a method of preparing such copolymers, a method of modifying porous fluoropolymer surfaces, and hydrophilic fluoropolymer porous membranes prepared therefrom. Also disclosed is a method of filtering fluids by the use of the hydrophilic fluoropolymer porous membranes.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: August 8, 2017
    Assignee: Pall Corporation
    Inventors: Khaled Abdel-Hakim Helmy Aamer, Jian Qiu, Hassan Ait-Haddou
  • Patent number: 9724649
    Abstract: Disclosed is a self-wetting porous membrane comprising an aromatic hydrophobic polymer such as polysulfone and a wetting agent comprising a copolymer of formula A-B or A-B-A, wherein A is a hydrophilic segment comprising a polymerized monomer of the formula (I): CH2?C(R1)(R2), wherein R1 and R2 are as described herein, and B is an aromatic hydrophobic polymeric segment, wherein segments B and A are linked through an amidoalkylthio group. Also disclosed is a method of preparing a self-wetting membrane comprising casting a solution containing an aromatic hydrophobic polymer and the wetting agent, followed by subjecting the cast solution to phase inversion. The self-wetting porous membrane finds use in hemodialysis, microfiltration, and ultrafiltration.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: August 8, 2017
    Assignee: Pall Corporation
    Inventors: Marcin Stasiak, Hassan Ait-Haddou
  • Patent number: 9718924
    Abstract: Disclosed is a block copolymer of the formula: A-B-A (I) or A-B (II), wherein block A is: (i) a polymer of allyl glycidyl ether or (ii) a polymer of allyl glycidyl ether wherein one more of the allyl groups have been replaced with 1,2-dihydroxypropyl group or a group of the formula: —(CH2)a—S—(CH2)b—X, wherein a, b, and X are defined herein. The block copolymers find use as wetting agents in the preparation of porous membranes from aromatic hydrophobic polymers such as polyethersulfone. Also disclosed are methods of preparing such block copolymers and porous membranes therefrom.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: August 1, 2017
    Assignee: Pall Corporation
    Inventors: Hassan Ait-Haddou, Frank Onyemauwa