Patents by Inventor Rene J. Couturier

Rene J. Couturier 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).

  • Granular propellant powder based on nitrocellulose, oily nitrate ester and polyvinyl nitrate, and process
    Patent number: 4347087
    Abstract: The present invention relates to propellant powders based on nitrocellulose, nitrated oil and polyvinyl nitrate and also to the process for their manufacture.The powders according to the invention contain between 50 and 75 parts by weight of nitrocellulose, between 5 and 25 parts by weight of nitrated oil and between 5 and 25 parts by weight of polyvinyl nitrate.The manufacturing process consists in malaxating the energy-producing bases in the presence of an acetone/alcohol mixture until a homogeneous paste is obtained, which is extruded, drained, chopped, soaked and dried, and the process is characterized in that(i) the proportion of acetone in the paste during malaxation is between 30 and 36% by weight, relative to the dry nitrocellulose and the dry polyvinyl nitrate, and in that the weight ratio acetone/alcohol is between 1.10 and 1.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: August 31, 1982
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Bernard M. Zeller, Rene J. Couturier, Robert A. Tribot