Patents by Inventor John Guinn Hefner

John Guinn Hefner 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).

  • Hot melt adhesives produced from linear alternating polyketones
    Patent number: 6239250
    Abstract: Olefin/CO linear alternating copolymers which are useful in hot melt adhesive applications are disclosed. The linear alternating copolymers have melting points ranging from 50 to 165° C. and exhibit a combination of properties which are desired for hot melt adhesives. Single olefins or combinations of olefins ranging from ethylene to C12 olefins can be used to form the linear alternating copolymer.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: May 29, 2001
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John Guinn Hefner, Lloyd Mahlon Robeson