Patents by Inventor Marco Rossinelli

Marco Rossinelli 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 manufacturing a precursor powder for use in making a varistor and a powder manufactured in this process
    Patent number: 5143711
    Abstract: A method for manufacturing a precursor powder for use in making a varistor is disclosed. This precursor powder is produced by preparing a homogeneous aqueous dispersion of metal oxides and/or metal hydroxides and heating the dispersion in a closed pressure reactor to a temperature between 200.degree. C. and 350.degree. C. for hydrothermally treating the homogeneous dispersion. The precursor powder produced in the afore-described method is highly homogeneous and of controlled crystal phase and morphology and after mixing with zinc oxide powder can homogeneously be reacted with the zinc oxide in a ceramic process.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: September 1, 1992
    Assignee: Asea Brown Boveri Ltd.
    Inventors: Wolfgang Kluge, Roger Perkins, Marco Rossinelli, William J. Dawson
  • Dry etching process
    Patent number: 4634495
    Abstract: In a dry etching process for patterning a substrate (2), an etching mask (4) consisting of a chemically deposited oxide, for example Al.sub.2 O.sub.3, is used and the etching is carried out in a fluorine-containing plasma. By this means, etching selectivities of more than 100 are achieved for a substrate (2) of silicon.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: January 6, 1987
    Assignee: BBC Brown, Boveri & Company Limited
    Inventors: Jens Gobrecht, Marco Rossinelli