Patents by Inventor Charles D. Sweeny

Charles D. Sweeny 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).

  • Method for treating effluent resulting from the manufacture of synthetic dyestuffs and related intermediate chemicals
    Patent number: 4005011
    Abstract: A method and apparatus for treating effluent resulting from the manufacture of synthetic dyestuffs and related intermediate chemicals is provided. The effluent is subjected to equalization, chemical treatment, clarification to remove solids, further equalization and carbon adsorption to remove the color and toxic materials, followed by a secondary biological treatment which includes treatment with activated sludge and secondary clarification. The spent carbon used in the carbon adsorption is recycled to produce fresh carbon which is reused in the carbon adsorption process.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: January 25, 1977
    Assignee: American Color & Chemical Corporation
    Inventor: Charles D. Sweeny