Patents by Inventor Maurice Gelus

Maurice Gelus 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 and apparatus for hydrolyzing cellulose material
    Patent number: 4478644
    Abstract: Process and device for hydrolyzing cellulose material in an extruder with two parallel screws in which the material introduced in the moist condition and, transported by the screws is malaxated, heated to a temperature of above 200.degree. C. in the downstream part of the extruder where it is contacted with an acid solution and progressively compressed, to a pressure higher than the saturated vapor pressure of the liquid phase of the hydrolyzed material at the temperature reached in the downstream part and maintained by a control device for the evacuation of the material.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: October 23, 1984
    Assignee: Creusot-Loire
    Inventors: Pierre Berger, Maurice Gelus