Patents by Inventor Wolf-Dieter Back

Wolf-Dieter Back 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).

  • Deodorization of used foam moldings, in particular fish crates
    Patent number: 5429798
    Abstract: A process for the deodorization of used foam moldings, in which the used foam moldings are treateda) with an aqueous solution of phosphoric acid, water-soluble primary or secondary phosphates or mixtures thereof.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: July 4, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Witt, Dietrich Scherzer, Klaus Hahn, Rolf Henn, Wolf-Dieter Back
  • Preparation of styrene polymer foam particles
    Patent number: 4990539
    Abstract: Styrene polymer foam particles of from 10 to 30 kg/m.sup.3 in density are obtained by foaming styrene polymers which, per kg, contain from 0.7 to 3 moles of blowing agent mixture composed of from 60 to 90 mol % of water and from 10 to 40 mol % of the C.sub.4 - or C.sub.5 -hydrocarbon with the aid of microwaves.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: February 5, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Hahn, Uwe Guhr, Roland Gellert, Wolf-Dieter Back