Patents by Inventor Herbert Dressing

Herbert Dressing 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).

  • Method of manufacturing a stopper
    Patent number: 6216898
    Abstract: A process of manufacturing a stopper comprises impregnating a cork body with an elastomeric substance such as a silicone rubber mixture. The cork is submerged in the mixture and a vacuum is applied to enhance penetration of the mixture into the cork. The cork is then cleaned by forcing it through a conduit to remove excess liquid, and cured. A thin coating, approximately 25 &mgr;m thick, of the rubber remains on the outer surface of the cork, so that its appearance and feel are not substantially different from that of an untreated cork.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: April 17, 2001
    Assignee: Portocork Internacional, S.A.
    Inventors: Christopher David Aberdein, Herbert Dressing