Patents by Inventor Arsenault, Normand P.

Arsenault, Normand P. 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).

  • Reaction bonded silicon nitride filtration membranes
    Patent number: 5004544
    Abstract: Strong and durable silicon nitride filtration membranes with effective separating layers having effective pore diameters less than about 1 micron are produced by depositing a source of silicon onto a porous microfilter support, removing any liquid used in the depositing, and subjecting the silicon source to nitridation conditions. Suitable sources of silicon include silicon per se and silica. When silica is used, a suitable reducing agent is deposited therewith to reduce the silica to silicon in situ.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: April 2, 1991
    Assignee: Norton Company
    Inventors: Robert A. Hay, Craig A. Willkens, Arsenault, Normand P.