Patents by Inventor Xuemei Liang
Xuemei Liang 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: 9469737Abstract: Hydrophilic porous membranes comprising a random copolymer of: (a) 2-hydroxyethyl methacrylate of formula (I): (b) an ethylene glycol dimethacrylate of formula (II): and (c) 1,1,1-trimethylolpropane trimethacrylate of formula (III): and a hydrophobic polymer; filters including the membranes, and methods of making and using the membranes, are disclosed.Type: GrantFiled: August 20, 2014Date of Patent: October 18, 2016Assignee: Pall CorporationInventors: Erik M. Heidenreich, Xuemei Liang, Binbing Han
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Patent number: 9415347Abstract: Asymmetric membranes comprising a first asymmetric porous zone including a first porous asymmetry that increases from the first exterior surface through the first porous zone of the bulk, and a second asymmetric porous zone including a second porous asymmetry that increases from the second exterior surface through the second porous zone of the bulk, wherein the first average pore size is larger than the second average pore size, as well as methods of making and using the membranes, are disclosed.Type: GrantFiled: March 2, 2015Date of Patent: August 16, 2016Assignee: Pall CorporationInventors: Xuemei Liang, Mark Murla, Binbing Han, Donald Simonton, Richard Morris
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Publication number: 20160053064Abstract: Hydrophilic porous membranes comprising a random copolymer of: (a) 2-hydroxyethyl methacrylate of formula (I): (b) an ethylene glycol dimethacrylate of formula (II): and (c) 1,1,1-trimethylolpropane trimethacrylate of formula (III): and a hydrophobic polymer; filters including the membranes, and methods of making and using the membranes, are disclosed.Type: ApplicationFiled: August 20, 2014Publication date: February 25, 2016Inventors: Erik M. HEIDENREICH, Xuemei LIANG, Binbing HAN
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Publication number: 20150190756Abstract: Asymmetric membranes comprising a first asymmetric porous zone including a first porous asymmetry that increases from the first exterior surface through the first porous zone of the bulk, and a second asymmetric porous zone including a second porous asymmetry that increases from the second exterior surface through the second porous zone of the bulk, wherein the first average pore size is larger than the second average pore size, as well as methods of making and using the membranes, are disclosed.Type: ApplicationFiled: March 2, 2015Publication date: July 9, 2015Inventors: Xuemei LIANG, Mark MURLA, Binbing HAN, Donald SIMONTON, Richard MORRIS
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Patent number: 9005496Abstract: Asymmetric membranes comprising a first asymmetric porous zone including a first porous asymmetry that increases from the first exterior surface through the first porous zone of the bulk, and a second asymmetric porous zone including a second porous asymmetry that increases from the second exterior surface through the second porous zone of the bulk, wherein the first average pore size is larger than the second average pore size, as well as methods of making and using the membranes, are disclosed.Type: GrantFiled: February 1, 2012Date of Patent: April 14, 2015Assignee: Pall CorporationInventors: Xuemei Liang, Mark Murla, Binbing Han, Donald Simonton, Richard Morris
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Publication number: 20140339165Abstract: Membranes having a single layer comprising first and second porous portions, wherein the first portion has a more open pore structure than the second portion, wherein the first porous portion includes a surface prepared by removing introduced particles, as well as methods of making and using the membranes, are disclosedType: ApplicationFiled: May 14, 2013Publication date: November 20, 2014Applicant: Pall CorporationInventors: Binbing Han, Xuemei Liang, Richard Alan Morris, Donald Carl Simonton, SR.
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Publication number: 20140339164Abstract: Membranes having first and second porous portions, wherein the first portion has a more open pore structure than the second portion, wherein the first porous portion includes pores prepared by removing introduced particles, as well as methods of making and using the membranes, are disclosed.Type: ApplicationFiled: May 14, 2013Publication date: November 20, 2014Applicant: Pall CorporationInventors: Xuemei Liang, Binbing Han, Richard Alan Morris
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Patent number: 8840791Abstract: A microfiltration membrane comprising (a) an asymmetric layer, (b) an isometric layer, and (c) an interface layer between the asymmetric layer and the isometric layer, the interface layer having a first portion contacting the asymmetric layer and a second portion contacting the isometric layer; wherein, (i) the asymmetric layer has a region contacting the first portion of the interface layer, the region including cells having a first porous structure; (ii) the isometric layer has a region contacting the second portion of the interface layer, the region including cells having a second porous structure; the first porous structure being larger than the second porous structure; and the first portion of the interface layer comprises cells having the first porous structure, and the second portion of the interface layer comprises cells having the second porous structure, and methods of making and using the membrane, are disclosed.Type: GrantFiled: September 1, 2011Date of Patent: September 23, 2014Assignee: Pall CorporationInventors: I-Fan Wang, Richard Morris, Xuemei Liang
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Publication number: 20130193075Abstract: Asymmetric membranes comprising a first asymmetric porous zone including a first porous asymmetry that increases from the first exterior surface through the first porous zone of the bulk, and a second asymmetric porous zone including a second porous asymmetry that increases from the second exterior surface through the second porous zone of the bulk, wherein the first average pore size is larger than the second average pore size, as well as methods of making and using the membranes, are disclosed.Type: ApplicationFiled: February 1, 2012Publication date: August 1, 2013Applicant: Pall CorporationInventors: Xuemei Liang, Mark Murla, Binbing Han, Donald Simonton, Richard Morris
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Publication number: 20130056420Abstract: A microfiltration membrane comprising (a) an asymmetric layer, (b) an isometric layer, and (c) an interface layer between the asymmetric layer and the isometric layer, the interface layer having a first portion contacting the asymmetric layer and a second portion contacting the isometric layer; wherein, (i) the asymmetric layer has a region contacting the first portion of the interface layer, the region including cells having a first porous structure; (ii) the isometric layer has a region contacting the second portion of the interface layer, the region including cells having a second porous structure; the first porous structure being larger than the second porous structure; and the first portion of the interface layer comprises cells having the first porous structure, and the second portion of the interface layer comprises cells having the second porous structure, and methods of making and using the membrane, are disclosed.Type: ApplicationFiled: September 1, 2011Publication date: March 7, 2013Applicant: Pall CorporationInventors: I-Fan WANG, Richard Morris, Xuemei Liang