Patents by Inventor Dieter Huff

Dieter Huff 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 for sulfonating aromatic polyether sulfones
    Patent number: 5013765
    Abstract: The sulfonation of aromatic polyether sulfones in a controllable manner is possible by means of sulfur trioxide in concentrated sulfuric acid as solvent. By maintaining a sulfur trioxide content of less than 6 percent by weight, based on the solvent, and a reaction temperature of less than 30.degree. C., side reactions and degradation reactions are to a large extent suppressed. The resultant products are suitable for preparation of membranes.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: May 7, 1991
    Assignee: Akzo N.V.
    Inventors: Heinz-Dieter Sluma, Dieter Huff
  • Process for the thermal polymerization of phosphazene polymers
    Patent number: 4431619
    Abstract: Process for the production of phosphazo polymers by thermal polymerization of a cyclic compound of the formula (NPCl.sub.2).sub.n in which n is an integer from 3 to 10 in the presence of a catalyst of the general formula R-O-SO.sub.2 -R.sup.1.
    Type: Grant
    Filed: October 8, 1982
    Date of Patent: February 14, 1984
    Assignee: Akzo NV
    Inventors: Joachim Behnke, Dieter Huff