Patents by Inventor David Bruce Christopher

David Bruce Christopher 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).

  • Apparatus and method for filtration efficiency improvements in fibrous filter media
    Patent number: 10279290
    Abstract: A method for improving air filtration efficiency of a fibrous nonwoven media and a fibrous non-woven air filtration media having improved filtration efficiency. The method includes applying to fibrous material at least about 0.05 wt. % based on a total weight of the fibrous material of chemical treatment comprising an alkoxylated silicone copolymer. The chemical treatment is effective to provide an improvement in an E3 filtration efficiency value of the filtration media as tested according to ASHRAE 52.2 of about 20% or more compared to an E3 filtration efficiency value of fibrous material devoid of any chemical treatment.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: May 7, 2019
    Assignee: HDK Industries, Inc.
    Inventors: David Bruce Christopher, Christopher Bruce Peart, Christopher A. Hagler
  • Apparatus and Method for Filtration Efficiency Improvements in Fibrous Filter Media
    Publication number: 20170173508
    Abstract: A method for improving air filtration efficiency of a fibrous nonwoven media and a fibrous non-woven air filtration media having improved filtration efficiency. The method includes applying to fibrous material at least about 0.05 wt. % based on a total weight of the fibrous material of chemical treatment comprising an alkoxylated silicone copolymer. The chemical treatment is effective to provide an improvement in an E3 filtration efficiency value of the filtration media as tested according to ASHRAE 52.2 of about 20% or more compared to an E3 filtration efficiency value of fibrous material devoid of any chemical treatment.
    Type: Application
    Filed: May 14, 2015
    Publication date: June 22, 2017
    Inventors: David Bruce Christopher, Christopher Bruce Peart, Christopher A. Hagler
  • Multicomponent fibers and fabrics made using the same
    Patent number: 6420285
    Abstract: The present invention provides multicomponent fibers arranged in structured domains. At least one of the polymer components is formed of a multipolymer blend. The present invention also provides nonwoven fabrics formed of the multicomponent fibers, the fabrics having a superior combination of extensibility, tensile properties and abrasion resistance. A second layer can be laminated to this coherent extensible nonwoven web.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 16, 2002
    Assignee: BBA Nonwovens Simpsonville, Inc.
    Inventors: David D. Newkirk, Harold Edward Thomas, David Bruce Christopher, Barry DeWayne Meece
  • Multicomponent fibers and fabrics made using the same
    Patent number: 6417122
    Abstract: The present invention provides multicomponent fibers arranged in structured domains. At least one of the polymer components is formed of a multipolymer blend. The present invention also provides nonwoven fabrics formed of the multicomponent fibers, the fabrics having a superior combination of extensibility, tensile properties and abrasion resistance. A second layer can be laminated to this coherent extensible nonwoven web.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 9, 2002
    Assignee: BBA Nonwovens Simpsonville, Inc.
    Inventors: David D. Newkirk, Harold Edward Thomas, David Bruce Christopher, Barry DeWayne Meece
  • Multicomponent fibers and fabrics made using the same
    Patent number: 6417121
    Abstract: The present invention provides multicomponent fibers arranged in structured domains. At least one of the polymer components is formed of a multipolymer blend. The present invention also provides nonwoven fabrics formed of the multicomponent fibers, the fabrics having a superior combination of extensibility, tensile properties and abrasion resistance. A second layer can be laminated to this coherent extensible nonwoven web.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 9, 2002
    Assignee: BBA Nonwovens Simpsonville, Inc.
    Inventors: David D. Newkirk, Harold Edward Thomas, David Bruce Christopher, Barry DeWayne Meece
  • Meltspun multicomponent thermoplastic continuous filaments, products made therefrom, and methods therefor
    Patent number: 5783503
    Abstract: Multicomponent thermoplastic continuous filaments are provided, including hollow core multicomponent filaments. The filaments are at least partially splittable into smaller filaments in the absence of mechanical treatment or application of high pressure water jets. The surface energy of the components can be controlled to control separation of the multi-component filaments. Sub-denier and micro-denier filaments of low orientation can be produced from relatively high molecular weight polymers to produce nonwovens of surprising strength, barrier, and cover.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: July 21, 1998
    Assignee: Fiberweb North America, Inc.
    Inventors: Jay Darrell Gillespie, David Bruce Christopher, Harold Edward Thomas, John Henry Phillips, Scott Louis Gessner, Lloyd Edwin Trimble, Jared Asher Austin