Patents by Inventor Andrew L. Hulse

Andrew L. Hulse 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).

  • Pigmentary material
    Patent number: 5753027
    Abstract: A transparent hematite, useful as a pigmentary material, is in the form of particles consisting essentially in their lattice of oxygen, iron and another metal M, the other metal being selected from the group consisting of cobalt, nickel, manganese, zirconium, vanadium, lithium and copper, and being present in an atomic ratio to the iron of 0.01-0.5:1, and the width of the particles, as measured by transmission electron microscopy, being less than 0.03 micron.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: May 19, 1998
    Assignee: Cookson Matthey Ceramics plc
    Inventors: Alan Burt, Andrew L. Hulse, Richard L. O'Leary