Patents by Inventor Neil Harkness

Neil Harkness 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).

  • Effluent treatment
    Patent number: 3966601
    Abstract: A purification process for industrial effluent containing dissolved dithiocarbamate is described. Before discharging the effluent, it is mixed at pH 6 to 8 with a soluble heavy metal salt and heavy metal dithiocarbamate thereby precipitated and the precipitate is separated from the effluent. By the process poisoning of fish in water courses into which the effluents are discharged can be avoided as can malfunctioning of sewage treatment processes handling the effluents.
    Type: Grant
    Filed: October 11, 1973
    Date of Patent: June 29, 1976
    Assignee: Robinson Brothers Ltd.
    Inventors: Arthur Stevenson, Neil Harkness