Patents by Inventor Anthony J. Butwell

Anthony J. Butwell 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).

  • Liquid treatment apparatus
    Patent number: 4600510
    Abstract: In a water treatment apparatus, the jets in the distributor arms of a percolating filter are kept clear from jamming by automatic actuation of plungers which enter the jets to dislodge any obstructions therein, each plunger being individually mounted on the arm adjacent its respective jet.
    Type: Grant
    Filed: April 4, 1985
    Date of Patent: July 15, 1986
    Assignee: Water Research Centre
    Inventor: Anthony J. Butwell