Patents by Inventor Steven John Harrold
Steven John Harrold 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: 10583400Abstract: Membrane elements that use multiple membrane leaves may have a limited total active membrane area due to an increased diameter at the ends of the element. Membrane leaves may comprise a permeate carrier positioned between one or more membrane sheets. Adhesive may be used to seal one or more edges of the membrane leaf. The membrane sheets, permeate carrier and the adhesive contribute to the thickness of the edges of the membrane leaf and the diameter at the ends of the element. A reduced thickness of the edges of the permeate carrier may reduce the diameter at the ends of an element. Another permeate carrier sheet may also be used that is distanced from at least one edge of the membrane sheet so the permeate carrier sheet does not contribute towards the increased diameter at the ends of the element.Type: GrantFiled: November 10, 2016Date of Patent: March 10, 2020Assignee: BL TECHNOLOGIES, INC.Inventors: Prashant Vishwanath Shrikhande, Steven John Harrold, Cha Moua, Phillip Goebel, Yatin Tayalia, Prasanna Rao Dontula
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Patent number: 9914098Abstract: The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate.Type: GrantFiled: March 10, 2016Date of Patent: March 13, 2018Inventors: Xingpeng Zhang, Lawrence C. Costa, Steven John Harrold, Babu Narayanswamy
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Publication number: 20170056829Abstract: Membrane elements that use multiple membrane leaves may have a limited total active membrane area due to an increased diameter at the ends of the element. Membrane leaves may comprise a permeate carrier positioned between one or more membrane sheets. Adhesive may be used to seal one or more edges of the membrane leaf. The membrane sheets, permeate carrier and the adhesive contribute to the thickness of the edges of the membrane leaf and the diameter at the ends of the element. A reduced thickness of the edges of the permeate carrier may reduce the diameter at the ends of an element. Another permeate carrier sheet may also be used that is distanced from at least one edge of the membrane sheet so the permeate carrier sheet does not contribute towards the increased diameter at the ends of the element.Type: ApplicationFiled: November 10, 2016Publication date: March 2, 2017Inventors: Prashant Vishwanath SHRIKHANDE, Steven John HARROLD, Cha MOUA, Phillip GOEBEL, Yatin TAYALIA, Prasanna Rao DONTULA
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Patent number: 9522363Abstract: Membrane elements that use multiple membrane leaves may have a limited total active membrane area due to an increased diameter at the ends of the element. Membrane leaves may comprise a permeate carrier positioned between one or more membrane sheets. Adhesive may be used to seal one or more edges of the membrane leaf. The membrane sheets, permeate carrier and the adhesive contribute to the thickness of the edges of the membrane leaf and the diameter at the ends of the element. A reduced thickness of the edges of the permeate carrier may reduce the diameter at the ends of an element. Another permeate carrier sheet may also be used that is distanced from at least one edge of the membrane sheet so the permeate carrier sheet does not contribute towards the increased diameter at the ends of the element.Type: GrantFiled: May 16, 2012Date of Patent: December 20, 2016Assignee: GENERAL ELECTRIC COMPANYInventors: Prashant Vishwanath Shrikhande, Steven John Harrold, Cha Moua, Phillip Goebel, Yatin Tayalia, Prasanna Rao Dontula
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Publication number: 20160193572Abstract: The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate.Type: ApplicationFiled: March 10, 2016Publication date: July 7, 2016Inventors: Xingpeng ZHANG, Lawrence C. COSTA, Steven John HARROLD, Babu NARAYANSWAMY
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Patent number: 9346023Abstract: The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate.Type: GrantFiled: August 21, 2012Date of Patent: May 24, 2016Assignee: GENERAL ELECTRIC COMPANYInventors: Xingpeng Zhang, Lawrence C. Costa, Steven John Harrold, Babu Narayanswamy
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Publication number: 20140054228Abstract: The present disclosure describes an additive that may be used in the manufacture of thin-film polyamide composite membranes. Thin-film polyamide composite membranes are used in filtration processes, such as reverse osmosis and nanofiltration. The additive may be an amino-siloxane compound. The amino-siloxane compound includes repeated groups of silicon bonded to oxygen with at least one amine functional group. Optionally, the amino-siloxane compound may also include a hydrophilic group. The additive reacts with an aqueous phase and an organic phase to form a thin polyamide film on a porous substrate.Type: ApplicationFiled: August 21, 2012Publication date: February 27, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Xingpeng ZHANG, Lawrence C. COSTA, Steven John HARROLD, Babu NARAYANSWAMY
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Patent number: 8580341Abstract: The present invention provides a composite membrane comprising a porous base membrane and a polyamide coating disposed on said porous base membrane, said polyamide coating comprising a C3-C8 cyclic carbonyl compound and a C1-C8 amide compound, said amide compound comprising at least one N—H moiety. In addition the present invention provides a method of preparing a composite membrane comprising contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide with an aqueous solution comprising a polyamine, said contacting being carried out on a surface of a porous base membrane, said organic solution further comprising a C3-C8 cyclic carbonyl compound, said aqueous solution comprising a C1-C8 amide compound, said amide compound comprising at least one N—H moiety.Type: GrantFiled: May 22, 2009Date of Patent: November 12, 2013Assignee: General Electric CompanyInventors: Hua Wang, Su Lu, Hua Li, Steven Thomas Rice, Joseph Anthony Suriano, Bing Zhang, Chen Wang, Lawrence Charles Costa, Steven John Harrold, David Allen Olson, Wenqing Peng
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Publication number: 20130098831Abstract: Membrane elements that use multiple membrane leaves may have a limited total active membrane area due to an increased diameter at the ends of the element. Membrane leaves may comprise a permeate carrier positioned between one or more membrane sheets. Adhesive may be used to seal one or more edges of the membrane leaf. The membrane sheets, permeate carrier and the adhesive contribute to the thickness of the edges of the membrane leaf and the diameter at the ends of the element. A reduced thickness of the edges of the permeate carrier may reduce the diameter at the ends of an element. Another permeate carrier sheet may also be used that is distanced from at least one edge of the membrane sheet so the permeate carrier sheet does not contribute towards the increased diameter at the ends of the element.Type: ApplicationFiled: May 16, 2012Publication date: April 25, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Prashant Vishwanath SHRIKHANDE, Steven John HARROLD, Cha MOUA, Phillip GOEBEL, Yatin TAYALIA, Prasanna Rao DONTULA
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Publication number: 20120292249Abstract: The present invention provides a composite membrane comprising a porous base membrane and a polyamide coating disposed on said porous base membrane, said polyamide coating comprising a C3-C8 cyclic carbonyl compound and a C1-C8 amide compound, said amide compound comprising at least one N—H moiety. In addition the present invention provides a method of preparing a composite membrane comprising contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide with an aqueous solution comprising a polyamine, said contacting being carried out on a surface of a porous base membrane, said organic solution further comprising a C3-C8 cyclic carbonyl compound, said aqueous solution comprising a C1-C8 amide compound, said amide compound comprising at least one N—H moiety.Type: ApplicationFiled: August 3, 2012Publication date: November 22, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Hua Wang, Su Lu, Hua Li, Steven Thomas Rice, Joseph Anthony Suriano, Bing Zhang, Chen Wang, Lawrence Charles Costa, Steven John Harrold, David Allen Olson, Wenqing Peng
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Publication number: 20100297429Abstract: The present invention provides a composite membrane comprising a porous base membrane and a polyamide coating disposed on said porous base membrane, said polyamide coating comprising a C3-C8 cyclic carbonyl compound and a C1-C8 amide compound, said amide compound comprising at least one N—H moiety. In addition the present invention provides a method of preparing a composite membrane comprising contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide with an aqueous solution comprising a polyamine, said contacting being carried out on a surface of a porous base membrane, said organic solution further comprising a C3-C8 cyclic carbonyl compound, said aqueous solution comprising a C1-C8 amide compound, said amide compound comprising at least one N—H moiety.Type: ApplicationFiled: May 22, 2009Publication date: November 25, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Hua Wang, Su Lu, Hua Li, Steven Thomas Rice, Joseph Anthony Suriano, Bing Zhang, Chen Wang, Lawrence Charles Costa, Steven John Harrold, David Allen Olson, Wenqing Peng