Patents by Inventor Jean-Calude Daumas

Jean-Calude Daumas 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).

  • Manufacture of phosgene from chlorine obtained by oxidation of hydrochloric gas and fixed on reactional chlorine exchanger masses
    Patent number: 3996273
    Abstract: The manufacture of phosgene from carbon monoxide and chlorine obtained by oxidation of hydrochloric acid gas in which the chlorine is fixed in the form of a copper chloride on an exchange mass formed of a granular support of silica gel having a specific surface of 10 m.sup.2 /g and a porous volume within the range of 0.3 to 1 cc/gram with the chlorides of potassium and copper being on the carrier with the possible addition of a chloride of rare earth metals.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: December 7, 1976
    Assignee: Rhone-Progil
    Inventor: Jean-Calude Daumas