Patents by Inventor Horst Döpfner

Horst Döpfner 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).

  • Process for producing workpieces and molded pieces out of cellulose and/or cellulose-containing fiber material
    Patent number: 6379594
    Abstract: A process for producing a work piece includes providing raw material which is cellulose-containing and fibrous, which is not any part of a tree, and which is selected from the group consisting of, crude plant fibers, pure cellulose, waste paper, and waste cardboard; adding water to the raw material; finely chopping the raw material in a machine by continuously grinding the raw material with a total energy expenditure of at least 0.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: April 30, 2002
    Assignee: Zellform Gesellschaft m.B.H.
    Inventors: Horst Döpfner, Martin Ernegg, Robert Bramsteidl