Patents by Inventor Sanford M. Stevenson

Sanford M. Stevenson 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 removing metal compounds from waste water
    Patent number: 7335309
    Abstract: A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferable 6 to 9; aerating the waste water; adding a flocculating agent to the water and allowing floccules including metal compounds to form; and separating said floccules including metal compounds from the water. An apparatus for carrying out this method is also disclosed.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: February 26, 2008
    Inventor: Sanford M. Stevenson
  • Apparatus for removing metal compounds from waste material
    Patent number: 6117314
    Abstract: A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferable 6 to 9; aerating the waste water; adding a flocculating agent to the water and allowing floccules including metal compounds to form; and separating said floccules including metal compounds from the water. An apparatus for carrying out this method is also disclosed.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: September 12, 2000
    Inventor: Sanford M. Stevenson
  • Apparatus for removing metal compounds from waste water
    Patent number: 5882513
    Abstract: A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferably 6 to 9; aerating the waste water; adding a flocculating agent to the water and allowing floccules including metal compounds to form; and separating said floccules including metal compounds from the water. An apparatus for carrying out this method is also disclosed.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: March 16, 1999
    Inventor: Sanford M. Stevenson
  • Method for treatment of waste water contaminated with cyanide ion
    Patent number: 5552062
    Abstract: A method for treating waste water contaminated with cyanide ion, such as mine acid water is provided. The apparatus is readily portable and comprises a reaction vessel having an aerator motor operatively associated therewith. Water to be treated is received within said reaction vessel and is treated by having a neutralizing agent by way of chemical pumps and oxidant by way of the aerator introduced simultaneously into the system. Because of instantaneous elevation of pH resulting from the simultaneous introduction of oxidant and the neutralizing agent, the reaction time is greatly reduced and the equipment required is small, compact and easily transported. Where concentrations of manganese are present in the waste water being treated in this process, it is preferred that those manganese concentrations be reduced before the method of the present invention is initiated.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: September 3, 1996
    Inventor: Sanford M. Stevenson
  • Method for removing metal compounds from waste water
    Patent number: 5370800
    Abstract: A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferably 6 to 9; aerating the waste water; adding a flocculating agent to the water and allowing floccules including metal compounds to form; and separating said floccules including metal compounds from the water. An apparatus for carrying out this method is also disclosed.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: December 6, 1994
    Inventor: Sanford M. Stevenson
  • Method and apparatus for treatment of acidic water
    Patent number: 4749497
    Abstract: A method and apparatus for treating acidic water, such as mine acid water is provided. The apparatus is readily portable and comprises a reaction vessel having an aerator motor operatively associated therewith. Water to be treated is received within said reaction vessel and is treated by having a neutralizing agent and oxidant by way of the aerator motor introduced simultaneously into the system. Because of instantaneous elevation of pH resulting from the simultaneous introduction of oxidant and the neutralizing agent, the reaction time is greatly reduced and the equipment required is small, compact and easily transported.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: June 7, 1988
    Assignee: Chemical Separation Technology, Inc.
    Inventors: Richard S. Kanzleiter, Thomas G. Simonetti, Kenneth E. Ball, Sanford M. Stevenson