Patents by Inventor Holger Herbst

Holger Herbst 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).

  • Purification of crude (meth)acrylic acid
    Patent number: 5482597
    Abstract: In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: January 9, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Holger Herbst, Gerhard Nestler, Jerry Darlington, Hans Martan