Patents by Inventor Francois Callut

Francois Callut 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 for the preparation of an absorbing and adsorbing agent; and the product produced therefrom
    Patent number: 4690914
    Abstract: A process for the preparation of noncarcinogenic, chemically inactive absorbing and adsorbing agents is presented and comprises, in part, treatment of a combustible material by pyrolisis for several hours and a subsequent stage of fritting or sintering at a high temperature. This fritting or sintering step permits the resultant product to acquire the required physical and chemical properties, especially a sufficiently high mechanical strength. This invention also includes the product produced from this process.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: September 1, 1987
    Assignee: Marginvest S.A. Holding
    Inventors: Francois Callut, Daniel Demeuldre