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).
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Patent number: 11045773Abstract: 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: GrantFiled: August 31, 2018Date of Patent: June 29, 2021Assignee: Pall CorporationInventors: Frank Onyemauwa, Hassan Ait-Haddou
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Patent number: 11040312Abstract: Disclosed are porous membranes including a porous support and a coating comprising a copolymer having monomeric units A and B, and optionally monomeric units C; wherein A is a halogenated vinyl monomer other than tetrafluoroethylene, a halogenated alkyl vinyl ether, or an alkene of the formula CnH2n, wherein n is 1-6; B is a perfluoro (alkyl vinyl)ether compound, a perfluoroalkyl vinyl compound, or a perfluoro alkoxyalkyl vinyl ether compound, each compound having one or more sulfonic acid groups or a salt thereof, one or more sulfonyl fluoride groups, one or more sulfonamide groups, or one or more sulfonate ester groups, and C is vinylidene fluoride. Also disclosed are methods of preparing such porous membranes and methods of treating fluids by the use of these membranes.Type: GrantFiled: May 9, 2019Date of Patent: June 22, 2021Assignees: Pall Corporation, Centre National de la Recherche ScientifiqueInventors: James A Belmont, Bruno Ameduri, Hassan Ait-Haddou, Gerald Lopez
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Publication number: 20200353427Abstract: Disclosed are porous membranes including a porous support and a coating comprising a copolymer having monomeric units A and B, and optionally monomeric units C; wherein A is a halogenated vinyl monomer other than tetrafluoroethylene, a halogenated alkyl vinyl ether, or an alkene of the formula CnH2n, wherein n is 1-6; B is a perfluoro (alkyl vinyl)ether compound, a perfluoroalkyl vinyl compound, or a perfluoro alkoxyalkyl vinyl ether compound, each compound having one or more sulfonic acid groups or a salt thereof, one or more sulfonyl fluoride groups, one or more sulfonamide groups, or one or more sulfonate ester groups, and C is vinylidene fluoride. Also disclosed are methods of preparing such porous membranes and methods of treating fluids by the use of these membranes.Type: ApplicationFiled: May 9, 2019Publication date: November 12, 2020Applicants: Pall Corporation, The Centre National de la Recherche ScientifiqueInventors: James A Belmont, Bruno Ameduri, Hassan Ait-Haddou, Gerald Lopez
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Patent number: 10737259Abstract: 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: GrantFiled: August 31, 2018Date of Patent: August 11, 2020Assignee: Pall CorporationInventors: Frank Onyemauwa, Hassan Ait-Haddou
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Publication number: 20200070104Abstract: 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: ApplicationFiled: August 31, 2018Publication date: March 5, 2020Applicant: Pall CorporationInventors: Frank Onyemauwa, Hassan Ait-Haddou
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Publication number: 20200070140Abstract: 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: ApplicationFiled: August 31, 2018Publication date: March 5, 2020Applicant: Pall CorporationInventors: Frank Onyemauwa, Hassan Ait-Haddou
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Patent number: 10576431Abstract: 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: GrantFiled: August 15, 2016Date of Patent: March 3, 2020Assignee: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
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Patent number: 10518225Abstract: 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: GrantFiled: August 15, 2016Date of Patent: December 31, 2019Assignee: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
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Patent number: 10471396Abstract: 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: GrantFiled: August 15, 2016Date of Patent: November 12, 2019Assignee: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
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Patent number: 10343122Abstract: 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: GrantFiled: August 15, 2016Date of Patent: July 9, 2019Assignee: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
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Patent number: 10315168Abstract: 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: GrantFiled: July 31, 2015Date of Patent: June 11, 2019Assignee: Pall CorporationInventors: Marcin Stasiak, Hassan Ait-Haddou, Frank O. Onyemauwa, Amarnauth Singh
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Patent number: 10239023Abstract: 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: GrantFiled: June 25, 2015Date of Patent: March 26, 2019Assignee: Pall CorporationInventors: Marcin Stasiak, Hassan Ait-Haddou
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Patent number: 10213750Abstract: 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: GrantFiled: March 29, 2017Date of Patent: February 26, 2019Assignee: Pall CorporationInventors: Khaled Abdel-Hakim Helmy Aamer, Jian Qiu, Hassan Ait-Haddou
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Patent number: 10130918Abstract: 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: GrantFiled: September 16, 2016Date of Patent: November 20, 2018Assignee: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou, Ying Labreche
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Patent number: 9962662Abstract: 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: GrantFiled: June 30, 2014Date of Patent: May 8, 2018Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Frank Onyemauwa
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Publication number: 20180078908Abstract: 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: ApplicationFiled: September 16, 2016Publication date: March 22, 2018Applicant: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou, Ying Labreche
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Publication number: 20180043314Abstract: 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: ApplicationFiled: August 15, 2016Publication date: February 15, 2018Applicant: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
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Publication number: 20180043313Abstract: 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: ApplicationFiled: August 15, 2016Publication date: February 15, 2018Applicant: Pall CorporationInventors: Frank Okezie Onyemauwa, Hassan Ait-Haddou
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Patent number: 9855534Abstract: 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: GrantFiled: December 28, 2016Date of Patent: January 2, 2018Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Khaled Abdel-Hakim Helmy Aamer
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Patent number: 9849428Abstract: 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: GrantFiled: April 30, 2015Date of Patent: December 26, 2017Assignee: Pall CorporationInventors: Marcin Stasiak, Hassan Ait-Haddou