Patents by Inventor Martin Dugan

Martin Dugan 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).

  • Method of producing yttrium oxide with particularly big particles
    Patent number: 4238467
    Abstract: Yttrium oxide with particularly big particles is formed by reacting yttrium ions with oxalate ions so that yttrium oxalate is precipitated. The precipitated yttrium oxalate is maintained at a temperature of 90.degree.-100.degree. C. for a period from 1/2 to 24 hours for formation of a crystal form of yttrium oxalate which can be dried and ignited to oxide without disintergrating. The heat-treatment can be combined with the precipitation and also with the subsequent drying and ignition to yttrium oxide.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: December 9, 1980
    Inventors: Martin Dugan, Norvald Gjelsvik