Patents by Inventor Harold W. Leverty

Harold W. Leverty 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).

  • Solventless compounding and coating of non-thermoplastic hydrocarbon elastomers
    Patent number: 5539033
    Abstract: A solvent-free hot melt process, for preparing a non-thermosettable, pressure-sensitive adhesive from a tackified non-thermoplastic hydrocarbon elastomer. The process employs a continuous compounding device that has a sequence of alternating conveying and processing zones. The processing zones masticate and mix materials in them. Non-thermoplastic elastomers having high molecular weight may be readily compounded into adhesives in the process.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: July 23, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Timothy D. Bredahl, Harold W. Leverty, Robert L. Smith, Richard E. Bennett, David J. Yarusso, Daniel C. Munson, Anthony R. Plepys
  • Solventless compounding and coating of non-thermoplastic hydrocarbon elastomers
    Patent number: RE36855
    Abstract: A solvent-free hot melt process, for preparing a non-thermosettable, pressure-sensitive adhesive from a tackified non-thermoplastic hydrocarbon elastomer. The process employs a continuous compounding device that has a sequence of alternating conveying and processing zones. The processing zones masticate and mix materials in them. Non-thermoplastic elastomers having high molecular weight may be readily compounded into adhesives in the process.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: September 5, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Timothy D. Bredahl, Harold W. Leverty, Robert L. Smith, Richard E. Bennett, David J. Yarusso, Daniel C. Munson, George E. Cox