Patents by Inventor Karen J. Campbell

Karen J. Campbell 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).

  • Electron-beam adhesion-promoting treatment of polyester film base for silicone release liners
    Patent number: 4533566
    Abstract: A silicone coating of a silicone release liner which has a polyester film base is better adhered to the film base and better resists removal when rubbed if the film base is first subjected to electron-beam irradiation while passing through an inert atmosphere such as nitrogen.
    Type: Grant
    Filed: July 5, 1984
    Date of Patent: August 6, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jack L. Evans, Karen J. Campbell, Curtis L. Kreil, LuAnn Sidney
  • Stable silicone-coated release liner for pressure-sensitive adhesive sheets
    Patent number: 4386135
    Abstract: Silicone-coated release liner which, even after exposure to light in the presence of moisture, heat or both, displays release properties of less than 20 g/cm width with respect to pressure-sensitive adhesive tape. The coating contains noble metal, and the silicone polymer has substantially no residual ethylenic unsaturation. The silicone polymer is prepared by pre-reacting polydimethyl siloxane with a noble metal catalyst before adding polymethylhydrosiloxane crosslinker.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: May 31, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Karen J. Campbell, Jack L. Evans