Patents Assigned to Porex Corporation
  • Publication number: 20090087605
    Abstract: The invention provides composite porous materials in which a second material is fused to and/or is in the pores and/or is fused directly to some of the pore walls of a porous first material. The invention also provides methods of filtering a fluid using these composite porous materials and methods of manufacturing the composite porous materials.
    Type: Application
    Filed: December 9, 2008
    Publication date: April 2, 2009
    Applicant: Porex Corporation, Inc.
    Inventors: Thomas H. Ramsey, Jerry Dean Raney, Jacob Shorr, Guoqiang Mao
  • Patent number: 7507469
    Abstract: Multi-layer coated materials and methods of making them are disclosed. In a specific embodiment, a porous polymeric substrate is pre-activated and immersed in a polyelectrolyte solution to form a first layer having an electric charge and at least one functional group. The coated material is next immersed in a second solution of a material having an electric charge opposite of that of the first layer to provide a bi-layer coating. This process can be repeated to form multi-layer coatings on porous substrates.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: March 24, 2009
    Assignee: Porex Corporation
    Inventors: Guoqiang Mao, George Greene, IV, Li Yao
  • Publication number: 20090019955
    Abstract: The present invention provides inexpensive pipettes and related structures offering high precision while minimizing the effects of operator error and chances of cross-contamination. In one embodiment, a pipette comprises a suction apparatus and a hollow body comprising a sample collection chamber, the sample collection chamber open at a first end and closed by a porous barrier material intermediate to or at a second end opposite the first end, wherein the suction apparatus is coupled to the hollow body.
    Type: Application
    Filed: April 24, 2008
    Publication date: January 22, 2009
    Applicant: POREX CORPORATION
    Inventors: Guoqiang Mao, Edward M. Kaucic, Ike Haldopoulos
  • Patent number: 7456025
    Abstract: The present invention relates to a sintered porous polymeric material useful as membrane in an analyte detection device, such as a lateral flow device, flow through device, or a dipstick device. The invention encompasses an analyte detection device that comprises such a sintered porous polymeric material and method of analyte detection using such a device. Specific sintered porous polymeric materials encompassed by the invention are surface activated and further coated with one or more layers of a variety of materials.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: November 25, 2008
    Assignee: Porex Corporation
    Inventors: Guoqiang Mao, Richard J. Coppola, George Warren Greene, George Yao
  • Patent number: 7125490
    Abstract: A filter has a longitudinal axis with an inner diameter defined by a hollow longitudinally extending center. The filter has fingers extend radially outwardly arcuately from the longitudinal axis. The fingers have base ends near the longitudinal axis and outer edges at extremities spaced from the longitudinal axis. The outer diameter of the filter is defined by the outer edges of the fingers. The filter is formed from a sintered porous molded thermoplastic or another material resulting in a filter more rigid than standard filters. The fingers are spaced apart from one another a predetermined, substantially fixed distance to form slots therebetween sized to capture contaminants therein.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: October 24, 2006
    Assignee: Porex Corporation
    Inventors: Michael Andrew Clendenning, Thomas Henry Ramsey, Tripp Augustus Avett, Timothy Allen Martin
  • Patent number: 7094464
    Abstract: Multi-layer coated materials and methods of making them are disclosed. In a specific embodiment, a porous polymeric substrate is pre-activated and immersed in a polyelectrolyte solution to form a first layer having an electric charge and at least one functional group. The coated material is next immersed in a second solution of a material having an electric charge opposite of that of the first layer to provide a bi-layer coating. This process can be repeated to form multi-layer coatings on porous substrates.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: August 22, 2006
    Assignee: Porex Corporation
    Inventors: Guoqiang Mao, George Greene, IV, Li Yao
  • Patent number: 6710093
    Abstract: This invention relates to processes for immobilizing ion exchange particles, and to the products of those process. One embodiment of the invention encompasses a process of immobilizing ion exchange particles within a porous polyolefinic material. A second embodiment encompasses a process of immobilizing ion exchange particles within a hydrogel. Preferred hydrogels are comprised of polyvinyl alcohol.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: March 23, 2004
    Assignee: Porex Corporation
    Inventors: Li Yao, George W. Greene, IV, Michael Gerald Arthur
  • Publication number: 20040009227
    Abstract: This invention relates to novel porous materials that possess antiviral and/or antimicrobial properties. The invention encompasses a porous material having antiviral or antimicrobial properties-which is comprised of a porous substrate and an antiviral or antimicrobial agent. The invention also encompasses a process for making porous materials that possess antiviral and/or antimicrobial properties and the products of the process.
    Type: Application
    Filed: April 8, 2003
    Publication date: January 15, 2004
    Applicant: Porex Corporation
    Inventor: Li Yao
  • Publication number: 20030211799
    Abstract: Fibers and fibrous materials are disclosed that comprise a functional fiber and a binder fiber. The functional fiber can be a continuous or a staple fiber, while the binder fiber is a staple bicomponent fiber. Uses of the fibers and fibrous materials are also disclosed.
    Type: Application
    Filed: June 19, 2003
    Publication date: November 13, 2003
    Applicant: Porex Corporation
    Inventors: Li Yao, Guoqiang Mao, Xingguo Li
  • Patent number: 6596240
    Abstract: A pipette tip member having an elongated tubular receptacle with a protrusion on an inner surface of the receptacle, and a recess on the inner surface adjacent the protrusion. The tip member has a generally conical shape and the protrusion extends around the inner surface to form an annular sealing ring. The protrusion has a V-shaped axial cross section with edges that intersect at an angle between about 30° and about 120°. The recess has a generally circular axial cross section and the recess is disposed proximal to the protrusion in the axial direction. The recess depth is about as great as the protrusion height. A method of forming a pipette tip member is also disclosed.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: July 22, 2003
    Assignee: Porex Corporation
    Inventors: Thomas Taggart, Howard Keith Spencer, Peter Paul Blaszcak
  • Publication number: 20030062311
    Abstract: This invention relates to processes for immobilizing ion exchange particles, and to the products of those process. One embodiment of the invention encompasses a process of immobilizing ion exchange particles within a porous polyolefinic material. A second embodiment encompasses a process of immobilizing ion exchange particles within a hydrogel. Preferred hydrogels are comprised of polyvinyl alcohol.
    Type: Application
    Filed: August 23, 2002
    Publication date: April 3, 2003
    Applicant: POREX CORPORATION
    Inventors: Li Yao, George W. Greene, Michael Gerald Arthur
  • Publication number: 20020179527
    Abstract: This invention relates to gas- or liquid-permeable materials that seal when exposed to water and methods of making such materials. In general, materials of this invention comprise a hydrogel adhered to pore walls of a porous substrate.
    Type: Application
    Filed: April 2, 2002
    Publication date: December 5, 2002
    Applicant: Porex Corporation
    Inventor: Li Yao
  • Patent number: 6399188
    Abstract: Porous products of thermoplastic polymers and the like are formed by sintering pellets, especially micropellets and/or pellets made by rapid water quenched pelletizing of the polymers, such as by underwater pelletizing or water ring pelletizing. The pellets are of a uniform size and shape, each having approximately equal dimensions along three mutually perpendicular axes, thereby producing porous products having smooth surfaces, narrow pore size distributions, greater strength and other improved characteristics. The porous products include antiperspirant and deodorant applicator heads, wastewater treatment bubblers and selective filters.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: June 4, 2002
    Assignee: Porex Corporation
    Inventors: Michael W. Smith, Daniel Fullerton