Patents by Inventor Johan H. H. T. Maat

Johan H. H. T. Maat 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).

  • Catalyst of a sintered iron oxide-containing article
    Patent number: 4789659
    Abstract: The tendency of sintered iron oxide articles, particularly those wherein the iron oxide in the sintered article is in the form of haematite, containing a minor proportion of calcium oxide to cracking on reduction of the iron oxide to iron is increased by the incorporation of a minor amount of magnesium aluminate spinel into the iron oxide composition.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: December 6, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventor: Johan H. H. T. Maat
  • Bed packing material
    Patent number: 4729982
    Abstract: A bed packing material, e.g. for use as a catalyst precursor, in the form of regular, preferably cylindrical, units having a multiplicity of through passages of small cross section so that the units have a low voidage, GV, a high ratio of the geometric surface area, GSA, to the volume V, of the equivalent cylindrical unit having no passages, and a high ratio of GSA to the product of GV and the surface area, A, of the equivalent cylindrical unit having no passages.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: March 8, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventors: Terence Thistlethwaite, Johan H. H. T. Maat, Peter J. Davidson