Patents by Inventor Robert H. Hackhel

Robert H. Hackhel 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).

  • Film backings prepared from thermoplastic polyester-urethane elastomers and phenoxy resins
    Patent number: 3959562
    Abstract: A flexible, solvent-resistant film backing for pressure-sensitive adhesives is disclosed. The backing comprises a thermoplastic essentially linear polyester-urethane elastomer and a thermoplastic phenoxy resin having the formula ##SPC1##Wherein n is an integer from 50 to 150, the phenoxy resin being present in an amount from about 35 to about 100 parts per 100 parts by weight of the polyester-urethane elastomer.
    Type: Grant
    Filed: November 6, 1973
    Date of Patent: May 25, 1976
    Inventor: Robert H. Hackhel