Patents by Inventor Pieter Walter William Buchan

Pieter Walter William Buchan 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).

  • Method of treating a plant or crop
    Patent number: 6564508
    Abstract: A method of treating a plant or crop includes exposing the plant or crop to an aqueous treatment stream which contains a wetting agent and calcium hypochlorite. Calcium hypochlorite is introduced into an aqueous flow stream to produce a treatment stream. The calcium hypochlorite produces hypochlorous acid, hypochlorite ions, calcium ions and hydroxyl ions and it is introduced so as to produce a treatment stream having a calcium hypochlorite concentration of between about 0.19 and 0.38 mM and a calcium ion concentration of between about 0.19 and 0.38 mM. The wetting agent is added to the water from which the flow stream is generated or to the flow stream or to the treatment stream and the plant or crop is exposed to the treatment stream.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: May 20, 2003
    Assignee: PPA Water Industries (Proprietary) Limited
    Inventor: Pieter Walter William Buchan