Patents by Inventor Francois Marie Fiessinger

Francois Marie Fiessinger 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 purifying water
    Patent number: 4051028
    Abstract: The invention relates to a process for the purification of water intended for human consumption or industrial use, and a process for the clarification of urban or industrial waste water, by means of a solution of a polymeric aluminum hydroxide which is prepared immediately before its use by adding an alkaline or alkaline-earth hydroxide to an aluminum salt. The conditions of preparation are chosen so as to prevent the formation of monomeric aluminum hydroxide.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: September 27, 1977
    Assignee: Degremont
    Inventor: Francois Marie Fiessinger