Patents by Inventor Nick Rigopoulos

Nick Rigopoulos 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).

  • Process for producing dense ceramic product
    Patent number: 5855841
    Abstract: A process for the production of dense polycrystalline silicon carbide shaped articles, includes the steps: (a) heating a powder compact containing silicon carbide and alumina or a precursor thereof together with a secondary sintering assist, to an intermediate temperature for an extended dwell, and then (b) heating the product of step (a) to a higher temperature for sufficient time to produce a dense polycrystalline silicon carbide product. The secondary sintering assist includes one or more rare earths or their precursors, for example scandia, yttria or dysprosia.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: January 5, 1999
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Mark Brian Trigg, Chull Hee Oh, Nick Rigopoulos