Patents Examined by Wilbur L. Bascombe, Jr.
  • Antithrombogenic hemo dialysis membranes
    Patent number: 4051040
    Abstract: The present invention involves the partial carboxymethylation of cellulose to provide antithrombogenic characteristics when used as a hemo dialysis membrane. Partial carboxymethylation is obtained by reacting cellulose with an alkali chloroacetate.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: September 27, 1977
    Assignee: John L. Hutchinson
    Inventors: James J. Hazdra, David J. Rausch, Karl O. Munninger
  • 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