Patents by Inventor Oscar W. Weber

Oscar W. Weber 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 color reduction of dye wastewater
    Patent number: 5360551
    Abstract: A highly colored dye wastewater is treated by a sequence of steps to obtain a color reduction of 90 percent or more. The method requires acidifying the wastewater and adding a cationic flocculant. A reducing agent is then, optionally, added to further reduce the color value of the wastewater and produce an oxidation-reduction potential of at least -200 and, generally, about -400 to -800. The reducing agent is, preferably, either a hydrosulfite or both a bisulfite and an alkali metal borohydride.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: November 1, 1994
    Assignee: Crompton & Knowles Corporation
    Inventor: Oscar W. Weber