Patents by Inventor Frank ONYEMAUWA
Frank ONYEMAUWA 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: 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: 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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Patent number: 9718924Abstract: 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: GrantFiled: June 30, 2014Date of Patent: August 1, 2017Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Frank Onyemauwa
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Patent number: 9394407Abstract: Disclosed are block copolymers of the formula A-B-A (I) or A-B (II), comprising blocks A and B, wherein block A is a hydrophilic polymeric segment comprising polyglycerol and block B is an aromatic hydrophobic polymeric segment. The block copolymers find use as wetting agents in the preparation of porous membranes from aromatic hydrophobic polymers such as polyethersulfone.Type: GrantFiled: June 30, 2014Date of Patent: July 19, 2016Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Frank Onyemauwa
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Patent number: 9309367Abstract: Disclosed is a porous membrane comprising a cellulosic material and a copolymer of the formula: A-B-A (I) or A-B (II), wherein block A, for example, polyglycerol, a polymer of allyl glycidyl ether, or a copolymer of glycidol and allyl glycidyl ether, or a polymer of allyl glycidyl ether or a copolymer of glycidol and allyl glycidyl ether wherein one or more allyl groups having been replaced by hydrophilic groups. Also disclosed is a method for preparing such a membrane.Type: GrantFiled: June 30, 2014Date of Patent: April 12, 2016Assignee: Pall CorporationInventors: Lixiang Xiao, Hassan Ait-Haddou, Frank Onyemauwa
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Patent number: 9303133Abstract: Disclosed is a hydrophilic porous membrane comprising a block copolymer of the formula: A-B-A (I) or A-B (II), wherein block A is (i) a copolymer of glycidol and allyl glycidyl ether, the copolymer having one or more allyl groups; or (ii) a copolymer of glycidol and allyl glycidyl ether, wherein one or more of the allyl groups of the copolymer 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 as defined herein, and block B is an aromatic hydrophobic polymeric segment, for example, polyethersulfone. Also disclosure is a method of preparing such porous membranes.Type: GrantFiled: June 30, 2014Date of Patent: April 5, 2016Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Frank Onyemauwa
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Patent number: 9260569Abstract: Disclosed are block copolymers suitable for preparing hydrophilic porous membranes, wherein the block copolymers are of the formula: A-B-A (I) and A-B (II), wherein block A is (i) a copolymer of glycidol and allyl glycidyl ether, the copolymer having one or more allyl groups; or (ii) a copolymer of glycidol and allyl glycidyl ether, wherein one or more of the allyl groups of the copolymer 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 as defined herein, and block B is an aromatic hydrophobic polymeric segment, for example, polyethersulfone. Also disclosed is a method of preparing such block copolymers.Type: GrantFiled: June 30, 2014Date of Patent: February 16, 2016Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Frank Onyemauwa
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Patent number: 9254466Abstract: Disclosed are crosslinked porous membranes comprising a cellulosic material and an aromatic hydrophobic moiety or a copolymer of the formula A-B-A (I) or A-B (II), wherein block A, for example, polyglycerol, a polymer of allylglycidyl ether, or a copolymer of glycidol and allyl glycidyl ether, or a polymer of allyl glycidyl ether or a copolymer of glycidol and allyl glycidyl ether wherein one or more allyl groups having been replaced by hydrophilic groups. Block B is an aromatic hydrophobic moiety. An example of the aromatic hydrophobic moiety is polyethersulfone. Also disclosed is a method for preparing such membranes.Type: GrantFiled: June 30, 2014Date of Patent: February 9, 2016Assignee: Pall CorporationInventors: Lixiang Xiao, Hassan Ait-Haddou, Frank Onyemauwa, Lauren A. Spielman, Shant M. Hambarsoomian
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Publication number: 20150376342Abstract: Disclosed are block copolymers suitable for preparing hydrophilic porous membranes, wherein the block copolymers are of the formula: A-B-A (I) and A-B (II), wherein block A is (i) a copolymer of glycidol and allyl glycidyl ether, the copolymer having one or more allyl groups; or (ii) a copolymer of glycidol and allyl glycidyl ether, wherein one or more of the allyl groups of the copolymer 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 as defined herein, and block B is an aromatic hydrophobic polymeric segment, for example, polyethersulfone. Also disclosed is a method of preparing such block copolymers.Type: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Hassan AIT-HADDOU, Frank ONYEMAUWA
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Publication number: 20150375177Abstract: Disclosed are crosslinked porous membranes comprising a cellulosic material and an aromatic hydrophobic moiety or a copolymer of the formula A-B-A (I) or A-B (II), wherein block A, for example, polyglycerol, a polymer of allylglycidyl ether, or a copolymer of glycidol and allyl glycidyl ether, or a polymer of allyl glycidyl ether or a copolymer of glycidol and allyl glycidyl ether wherein one or more allyl groups having been replaced by hydrophilic groups. Block B is an aromatic hydrophobic moiety. An example of the aromatic hydrophobic moiety is polyethersulfone. Also disclosed is a method for preparing such membranes.Type: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Lixiang XIAO, Hassan AIT-HADDOU, Frank ONYEMAUWA, Lauren A. SPIELMAN, Shant M. HAMBARSOOMIAN
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Publication number: 20150376341Abstract: 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: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Hassan AIT-HADDOU, Frank ONYEMAUWA
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Publication number: 20150376340Abstract: Disclosed are block copolymers of the formula A-B-A (I) or A-B (II), comprising blocks A and B, wherein block A is a hydrophilic polymeric segment comprising polyglycerol and block B is an aromatic hydrophobic polymeric segment. The block copolymers find use as wetting agents in the preparation of porous membranes from aromatic hydrophobic polymers such as polyethersulfone.Type: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Hassan AIT-HADDOU, Frank ONYEMAUWA
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Publication number: 20150376364Abstract: Disclosed is a hydrophilic porous membrane comprising a block copolymer of the formula: A-B-A (I) or A-B (II), wherein block A is (i) a copolymer of glycidol and allyl glycidyl ether, the copolymer having one or more allyl groups; or (ii) a copolymer of glycidol and allyl glycidyl ether, wherein one or more of the allyl groups of the copolymer 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 as defined herein, and block B is an aromatic hydrophobic polymeric segment, for example, polyethersulfone. Also disclosure is a method of preparing such porous membranes.Type: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Hassan AIT-HADDOU, Frank ONYEMAUWA
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Publication number: 20150375181Abstract: 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: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Hassan AIT-HADDOU, Frank ONYEMAUWA
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Publication number: 20150376362Abstract: Disclosed is a porous membrane comprising a cellulosic material and a copolymer of the formula: A-B-A (I) or A-B (II), wherein block A, for example, polyglycerol, a polymer of allyl glycidyl ether, or a copolymer of glycidol and allyl glycidyl ether, or a polymer of allyl glycidyl ether or a copolymer of glycidol and allyl glycidyl ether wherein one or more allyl groups having been replaced by hydrophilic groups. Also disclosed is a method for preparing such a membrane.Type: ApplicationFiled: June 30, 2014Publication date: December 31, 2015Inventors: Lixiang XIAO, Hassan AIT-HADDOU, Frank ONYEMAUWA
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Patent number: 8802448Abstract: Substrates comprising a solid support, a ligand, and a linker comprising at least one C, O, N, or S atom covalently connecting the solid support to the ligand, are disclosed, along with methods of using and making the substrates, and devices including the substrates.Type: GrantFiled: July 23, 2012Date of Patent: August 12, 2014Assignee: Pall CorporationInventors: Hassan Ait-Haddou, Frank Onyemauwa, Jonathan Haigh, Samuel Nochumson
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Publication number: 20130030154Abstract: Substrates comprising a solid support, a ligand, and a linker comprising at least one C, O, N, or S atom covalently connecting the solid support to the ligand, are disclosed, along with methods of using and making the substrates, and devices including the substrates.Type: ApplicationFiled: July 23, 2012Publication date: January 31, 2013Applicant: PALL CORPORATIONInventors: Hassan AIT-HADDOU, Frank ONYEMAUWA, Jonathan HAIGH, Samuel NOCHUMSON