Patents by Inventor Donald Kenneth Smith

Donald Kenneth Smith 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).

  • Methods of recovering wool grease from spent wool scouring liquor
    Patent number: 4007117
    Abstract: Method of treating wool scouring liquor effluent to render it suitable for recycling or discharge and to concurrently recover wool grease as a by-product. The method comprises mixing scouring liquor effluent with sufficient alcohol to produce a concentration in excess of saturation to leave a discrete alcohol phase, adding a selected flocculant to effect a liquid/liquid separation of grease from the liquor and stripping the separated grease from the alcohol phase.
    Type: Grant
    Filed: November 20, 1974
    Date of Patent: February 8, 1977
    Assignee: New Zealand Inventions Development Authority
    Inventors: Donald Kenneth Smith, Corran Norman Stuart McLachlan