Patents by Inventor Alfred M. Langberg

Alfred M. Langberg 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).

  • Apparatus for and method of recovering water used to backwash and rinse a filter
    Patent number: 4028241
    Abstract: A system for recovering chemically-treated water used to backwash and rinse a manganese oxide zeolite filter. The backwash and rinse waters are placed in a recovery basin, preferably with a coagulating agent, wherein the waters are agitated and then allowed to settle and thereby to separate from the water impurities removed from the filter. The backwash and rinse water so purified is then returned to the filter inlet for a normal service filtering pass through the filter. A number of filters are preferably serviced by each recovery basin, and automatic control means for the system are also disclosed.
    Type: Grant
    Filed: October 1, 1976
    Date of Patent: June 7, 1977
    Assignee: Hungerford & Terry, Inc.
    Inventors: Raymond R. Davis, Alfred M. Langberg, Alvin P. Debus