Patents by Inventor Eckhardt Puerkner

Eckhardt Puerkner 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).

  • Use of polyester resins as hot-melt adhesives
    Patent number: 5518571
    Abstract: The invention relates to the use of special alkyd resins and/or special polyester resins of monobasic carboxylic acids and/or esters thereof, polybasic carboxylic acids and/or anhydrides thereof, polyhydric alcohols and polyethylene glycol containing residual acid carboxyl groups at least partly reacted to form salts as pressure-sensitive hot-melt adhesives removable with aqueous solutions.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: May 21, 1996
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Eckhardt Puerkner, Hermann Onusseit, Ulrich Eicken