Patents by Inventor Richard Akam

Richard Akam 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).

  • Cerium oxide-metal/metalloid oxide mixture
    Patent number: 5897675
    Abstract: A finely-divided cerium metal/metalloid oxide mixture, containing pyrogenically produced metal/metalloid oxide and 0.001 to 95 wt. % cerium oxide, has a specific surface area between 10 and 400 m.sup.2 /g. The mixture is produced by mixing pyrogenically produced metal/metalloid oxide, having a specific surface area between 30 and 400 m.sup.2 /g, with a cerium compound decomposable to an oxide at elevated temperature, the cerium compound being thermally decomposed to the oxide. The cerium oxide-metal/metalloid oxide mixture can be used as a polishing agent or filler.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: April 27, 1999
    Assignee: Degussa Aktiengesellschaft
    Inventors: Helmut Mangold, Werner Hartmann, Richard Akam