Patents by Inventor Walter W. Robinson

Walter W. Robinson 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).

  • Treating of waste water with bauxite to remove phosphates from the waste water
    Patent number: 5271848
    Abstract: Bauxite mineral is used directly, to remove phosphates from water, in a high efficiency, highly economical system. The process of the invention involves the step of contacting the waste water stream with Bauxite for a time sufficient to lower the phosphate concentration to a predetermined lower level. The predetermined lower level is typically less than about 2 mg/l of water, and can be to a concentration of less than 1 mg/l. The Bauxite has an average particle size of greater than about 50 mesh. Advantageously, the particle size is at least about one quarter of an inch.The Bauxite which is used can be washed and graded to produce Bauxite having a particle size on the order of about one quarter of an inch. The Bauxite can be ground to an average particle size of at least about 50 mesh to produce a material having a higher reaction rate.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: December 21, 1993
    Inventors: Rodney W. Smith, William M. Markham, Walter W. Robinson