Patents by Inventor Burke R. Blevins

Burke R. Blevins 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).

  • Magnetic recording medium comprising magnetic particles and an electron beam curable polyurethane binder having segments derived from a specified unsaturated diol
    Patent number: 5281482
    Abstract: A method and agent for improving polyurethane binder compositions are provided. The method comprises introducing into the polyurethane backbone a diol residue including a double bond therein. Preferably the double bond is positioned in a moiety pendant from the polyurethane backbone. In preferred compounds, the double bond-containing residue is introduced in sufficient quantities to provide at least one double bond every 2,000-3,000 molecular weight units of polymer. Preferred agents include acrylate-, methacrylate-, acrylamide-, norbornenyl- and cyclohexenyl- groups. Preferred compositions, both cured and uncured, are provided. Also, use of such a composition in magnetic recording media is described.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: January 25, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John A. Martens, Burke R. Blevins
  • Electron-beam curable polyurethane compositions; and method
    Patent number: 5028683
    Abstract: A method and agent for improving polyurethane binder compositions are provided. The method comprises introducing into the polyurethane backbone a diol residue including a double bond therein. Preferably the double bond is positioned in a moiety pendant from the polyurethane backbone. In preferred compounds, the double bond-containing residue is introduced in sufficient quantities to provide at least one double bond every 2,000-3,000 molecular weight units of polymer. Preferred agents include acrylate-, methacrylate-, acrylamide-, norbornenyl-, and cyclohexenyl-groups. Preferred compositions, both cured and uncured, are provided. Also, use of such a composition in magnetic recording media is described.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: July 2, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John A. Martens, Burke R. Blevins