Patents by Inventor Jean-Baptise Donnet

Jean-Baptise Donnet 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).

  • Processes for the manufacturing of precipitated silica
    Patent number: 4243428
    Abstract: Process for the manufacturing of silicas having a specific surface area ranging between 100 and 600 sq m/g, which does not vary upon drying, due to the action of a strong acid on an alkaline silicate, characterized by the fact that the addition of strong acid to the alkaline silicate is interrupted one to three times.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: January 6, 1981
    Inventors: Jean-Baptise Donnet, Bernard Baudru, Maurice Coudurier, Georges Vrisakis