Patents by Inventor Bernhard A. Wolf

Bernhard A. Wolf 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 and apparatus for industrial fractionation of polymers
    Patent number: 5242594
    Abstract: In a process for industrial fractionation of polymers using an extraction column and a homogeneous extraction agent a homogeneous feed is supplied to a region of the extraction column which is nearer the upper end thereof when the feed has a greater density than the extraction agent and which is nearer the lower end thereof when the feed has a lower density than the extraction agent. An apparatus for carrying out this process consists advantageously, instead of a pulsed sieve plate column as hitherto, of an unpulsed filling body column which leads to a better separation because a back mixing is avoided in favourable manner.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: September 7, 1993
    Assignee: Pluess-Staufer AG
    Inventors: Klaus Weinmann, Lutz Tschersich, Bernhard A. Wolf
  • Solution polymerization for the preparation of gel-free ethylene/vinyl acetate copolymers
    Patent number: 4937303
    Abstract: High molecular weight, gel-free ethylene/vinyl acetate copolymers may be prepared by the process of solution polymerization if a particular relationship of temperature/pressure is observed.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: June 26, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard A. Wolf, Bernhard Will, Werner Obrecht, Rudolf Casper, Wolfgang Baade, Gerd Sylvester, Kurt-Peter Meurer, Hugo Zimmermann