Patents by Inventor Stewart A. Roth

Stewart A. Roth 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).

  • Patent number: 8882898
    Abstract: The present invention is directed to an emulsified release agent for use in manufacturing of wood products from wood fibers or chips with pMDI adhesives, where the application process for the release agent would normally agitate the release agent. The emulsified release agent is simple to manufacture, has good stability and storage, provides effective release between the wood product and the metal surfaces, allows for production of wood products from wood fibers or chips at high temperature, without causing excessive press buildup and improves the physical properties of the wood product and shortens press time. The emulsified release agent composition for use with a pMDI adhesive comprises an emulsified mixture of: (a) an alkali metal salt of a fatty acid having 8-18 carbon atoms, and (b) an alkali metal salt of a phosphate ester having 6-22 carbon atoms and having an HLB number of 4 or less.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: November 11, 2014
    Assignee: Guardian Chemicals, Inc.
    Inventors: Jiping Fang, Stewart A. Roth
  • Publication number: 20120301622
    Abstract: The present invention is directed to an emulsified release agent for use in manufacturing of wood products from wood fibers or chips with pMDI adhesives, where the application process for the release agent would normally agitate the release agent. The emulsified release agent is simple to manufacture, has good stability and storage, provides effective release between the wood product and the metal surfaces, allows for production of wood products from wood fibers or chips at high temperature, without causing excessive press buildup and improves the physical properties of the wood product and shortens press time. The emulsified release agent composition for use with a pMDI adhesive comprises an emulsified mixture of: (a) a sodium salt of a fatty acid having 8-18 carbon atoms, and (b) a sodium salt of a phosphate ester having 6-22 carbon atoms and having an HLB number of 4 or less.
    Type: Application
    Filed: November 29, 2010
    Publication date: November 29, 2012
    Applicant: GUARDIAN CHEMICALS INC.
    Inventors: Jiping Fang, Stewart A. Roth
  • Patent number: 8309503
    Abstract: The present invention is directed to a pMDI release agent that is simple to manufacture and use, provides release between the board and the metal surfaces, allows for production of OSB at high temperature, without causing excessive press buildup and improves the board physical properties and shortens press time. The release agent composition for use with a pMDI adhesive comprises a mixture of: (a) a sodium salt of a fatty acid having at least 8 carbon atoms, and (b) a sodium salt of a phosphate ester having 8-12 carbon atoms.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: November 13, 2012
    Assignee: Guardian Chemicals Inc.
    Inventors: Jiping Fang, Stewart Roth
  • Publication number: 20100048444
    Abstract: The present invention is directed to a pMDI release agent that is simple to manufacture and use, provides release between the board and the metal surfaces, allows for production of OSB at high temperature, without causing excessive press buildup and improves the board physical properties and shortens press time. The release agent composition for use with a pMDI adhesive comprises a mixture of: (a) a sodium salt of a fatty acid having at least 8 carbon atoms, and (b) a sodium salt of a phosphate ester having 8-12 carbon atoms.
    Type: Application
    Filed: July 31, 2009
    Publication date: February 25, 2010
    Applicant: GUARDIAN CHEMICALS INC.
    Inventors: Jiping Fang, Stewart Roth