Patents by Inventor Leo W. Halm

Leo W. Halm 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).

  • Stable, low cure-temperature semi-structural pressure sensitive adhesive
    Patent number: 5721289
    Abstract: A curable pressure sensitive adhesive having long shelf stability comprising (a) at least one free radically polymerized polymer; (2) at least one cationically-polymerizable monomer; (3) a photo-activatable catalyst system for the cationically-polymerizable monomer comprising either at least one organometallic complex salt or at least one onium salt; and (4) optionally, a monohydric or polyhydric alcohol, wherein there is essentially no conversion of the cationically-polymerizable monomer of the curable pressure sensitive adhesive when stored in a manner to exclude actinic radiation, and methods of making the same.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: February 24, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Naimul Karim, Kevin E. Kinzer, Albert I. Everaerts, Leo W. Halm, Steven J. Keipert, Jerry W. Williams
  • Energy curable compositions having improved cure speeds
    Patent number: 5212210
    Abstract: A composition and method provide improved physical properties and cure speed of polyurethane precursors, with or without free radical polymerizable monomers or oligomers present, by use of a two component catalyst system. The resin blend can be activated with a latent organometallic catalyst combined with an organic peroxide which can be a hydroperoxide or an acyl peroxide to decrease the cure time while increasing the break energy and tangent modulus of the system.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: May 18, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Leo W. Halm