Patents by Inventor Ivan J. Hopkins

Ivan J. Hopkins 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 recycling the water used in a process for recovering glass from municipal waste
    Patent number: 4276155
    Abstract: A process for efficiently recycling the water used in the various stages of a process for recovering glass from municipal trash. The invention comprises the separate treatment and recycling of the process water resulting from the first step separation of the incoming trash into a glass and inorganic constituent and an organic constituent for reuse in that step; the separate treatment and recycling of the process water emanating from the second step size classification to either the first or second steps; and, the treatment and recycling of the process water used in the froth flotation separation of the glass from the other inorganic constituents to any of the three steps in the process.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: June 30, 1981
    Assignee: Occidental Petroleum Corporation
    Inventors: John G. Roeschlaub, Ivan J. Hopkins