Patents by Inventor Friedbert Hofmann

Friedbert Hofmann 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).

  • Patent number: 4800086
    Abstract: Ascorbic acid granules for direct tableting are prepared by the compacting method, wherein the ascorbic acid in the form of crystals or crystal fragments, of which not more than 40% by weight have a longest particle diameter of less than 50 .mu.m and not more than 15% by weight have a longest particle diameter greater than 500 .mu.m, and as a mixture with from 0.8 to 8% by weight of soluble polyvinylpyrrolidone having a water content of from 0.3 to 5% is compacted in a conventional manner, and the product is comminuted.
    Type: Grant
    Filed: December 18, 1985
    Date of Patent: January 24, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Buehler, Friedbert Hofmann, Robert Heinz
  • Patent number: 4656157
    Abstract: A molded catalyst for reactions carried out under heterogeneous catalysis consists of a catalytically active material shaped into hollow cylinders, or of an inert carrier which is shaped into hollow cylinders and onto which catalytically active material is applied the external diameter of the hollow cylinders being from 3 to 20 mm, the internal diameter being from 0.1 to 0.7 times the external diameter and the length being from 0.2 times to twice the external diameter. The end faces of the hollow cylinder are curved so that the radius of curvature is from 0.4 to 5 times the external diameter.The novel catalysts are particularly useful for partial oxidation in the gas phase.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: April 7, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedbert Hofmann, Richard Krabetz, Matthias Schwarzmann