Patents by Inventor Viktor Mathieu

Viktor Mathieu 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).

  • Patent number: 4578229
    Abstract: Method for the manufacture of oxidic nuclear fuel bodies by a heat treatment of blanks obtained from UO.sub.2 starting power or a mixture of UO.sub.2 and PuO.sub.2 starting powder at a treatment temperature in the range of 1000.degree. C. to 1400.degree. initially in a gas atmosphere with oxidizing action and subsequently in a gas atmosphere with reducing action. The oxygen potential of the gas atmosphere with oxidizing action is kept in a range in which a crystallographically demonstrable U.sub.4 O.sub.9 or (U, Pu).sub.4 O.sub.9 crystal phase is generated in the blanks during the heating to the treatment temperature in this gas atmosphere with oxidizing action.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: March 25, 1986
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Helmut Assmann, Gerhard Dichtjar, Wolfgang Dorr, Georg Maier, Viktor Mathieu, Martin Peehs
  • Patent number: 4348339
    Abstract: Manufacture of oxidic nuclear fuel bodies with oxygen-to-metal ratio of 2.0.+-.0.02 at relatively low sintering temperature in range of 1000.degree.-1400.degree. C. Nuclear fuel powder with an arbitrary oxygen-to-metal ratio is mixed with a grain-growth promoting additive (U.sub.3 O.sub.8) and pressed into blanks. The blanks are subjected to a two-stage operation in a furnace at 1000.degree.-1400.degree. C. - an oxidative-sintering stage in a carbon dioxide atmosphere and a reducing stage in a hydrogen containing atmosphere.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: September 7, 1982
    Assignees: Kraftwerk Union Aktiengesellschaft, Reaktor-Brennelement Union GmbH
    Inventors: Helmut Assmann, Egbert Brandau, Wolfgang Dorr, Viktor Mathieu, Gerhard Dichtjar
  • Patent number: 4011037
    Abstract: A boat for carrying a load of stacked layers of interspaced pellets through a high-temperature continuous furnace, has a base for carrying the load through the furnace and having upstanding posts, each of the layers being carried by a sheet having holes through which the posts are inserted to prevent lateral shifting of the sheets.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: March 8, 1977
    Assignee: Reaktor-Brennelement Union GmbH
    Inventors: Viktor Mathieu, Reinhard Schafer