Patents by Inventor David Gerald Wernsing

David Gerald Wernsing 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).

  • Open celled foam and method of making an open celled foam
    Patent number: 5919833
    Abstract: A lightweight open celled foam, having a density no greater than 6 pounds per cubic foot (pcf) and a ratio of imide to amide groups greater than 1 to 1 and no greater than 19 to 1, is the reaction product made from an organic polyisocyanate having at least two functional groups per molecule and a mixture of a difunctional acid and a difunctional anhydride in the presence of a tertiary amine catalyst and a nonionic, organic surfactant having a hydrophilic/lipophilic balance (HLB) of at least 12, with the reactants generating carbon dioxide during the manufacturing process.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: July 6, 1999
    Assignee: Inspee Foams, Inc.
    Inventors: David Gerald Wernsing, Carol Jean Claypool
  • Open celled low density foam and method of making such an open celled foam
    Patent number: 5900440
    Abstract: A lightweight open celled foam, having a density no greater than 0.5 pounds per cubic foot (pcf), preferably between 0.1 and 0.4 pcf, and a ratio of imide to amide groups greater than 1 to 1 and no greater than 19 to 1, is the reaction product made from an organic polyisocyanate having at least two functional groups per molecule and a mixture of a difunctional acid and a difunctional anhydride in the presence of a tertiary amine catalyst and a surfactant, with the reactants generating carbon dioxide during the manufacturing process. The reaction is interrupted when the amount of carbon dioxide generated from the reactants is from about 1% to about 8% by weight of the total mass of the reactants. The reaction mass is transferred after the interruption step to a second stage to complete the generation of carbon dioxide and the formation of the low density foam product.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: May 4, 1999
    Assignee: Inspec Foams, Inc.
    Inventors: David Gerald Wernsing, Carol Jean Claypool
  • Open celled low density foam and method of making such an open celled foam
    Patent number: 5786404
    Abstract: A lightweight open celled foam, having a density no greater than 0.5 pounds per cubic foot (pcf), preferably between 0.1 and 0.4 pcf, and a ratio of imide to amide groups greater than 1 to 1 and no greater than 19 to 1, is the reaction product made from an organic polyisocyanate having at least two functional groups per molecule and a mixture of a difunctional acid and a difunctional anhydride in the presence of a tertiary amine catalyst and a surfactant, with the reactants generating carbon dioxide during the manufacturing process. The reaction is interrupted when the amount of carbon dioxide generated from the reactants is from about 1% to about 8% by weight of the total mass of the reactants. The reaction mass is transferred after the interruption step to a second stage to complete the generation of carbon dioxide and the formation of the low density foam product.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: July 28, 1998
    Assignee: Johns Manville International, Inc.
    Inventors: David Gerald Wernsing, Carol Jean Claypool
  • Open celled foam and method of making an open celled foam
    Patent number: 5770636
    Abstract: A lightweight open celled foam, having a density no greater than 6 pounds per cubic foot (pcf) and a ratio of imide to amide groups greater than 1 to 1 and no greater than 19 to 1, is the reaction product made from an organic polyisocyanate having at least two functional groups per molecule and a mixture of a difunctional acid and a difunctional anhydride in the presence of a tertiary amine catalyst and a nonionic, organic surfactant having a hydrophilic/lipophilic balance (HLB) of at least 12, with the reactants generating carbon dioxide during the manufacturing process.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: June 23, 1998
    Assignee: Johns Manville International, Inc.
    Inventors: David Gerald Wernsing, Carol Jean Claypool