Patents by Inventor Allen H. Erickson

Allen H. Erickson 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).

  • Wastewater treatment process
    Patent number: 4407717
    Abstract: A process for treating wastewaters with a powdered adsorbent and one or more fixed media filters, wherein biological oxidation occurs. The adsorbent is optionally regenerated and reused. In multistage operation, adsorbent is contacted with wastewater in stagewise countercurrent flow, through each fixed media filter and subsequent clarifier, or through clarifier only.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: October 4, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Gerald H. Teletzke, Allen H. Erickson