Patents by Inventor Robert E. Zenk

Robert E. Zenk 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).

  • Tackified crosslinked acrylic adhesives
    Patent number: 4418120
    Abstract: Pressure-sensitive adhesive tape is made by coating a sheet backing with a solution of iso-octyl acrylate:acrylic acid copolymer containing a tackifying rosin ester and an anti-oxidant, evaporating the solvent, and crosslinking the adhesive. The resultant adhesive has an excellent balance of the tack, peel adhesion, and shear properties, even at 70.degree. C., and adheres well to low energy surfaces.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: November 29, 1983
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Joanne P. Kealy, Robert E. Zenk
  • Transfer tape having adhesive formed from two laminae
    Patent number: 4335171
    Abstract: Pressure-sensitive adhesive transfer tape in which the adhesive is a laminate of two physically dissimilar laminae. The product is uniquely adapted to mounting vinyl roofs on automobiles.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: June 15, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert E. Zenk