Patents by Inventor Alan Keith Haines

Alan Keith Haines 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).

  • Contacting liquids and solids in countercurrent
    Patent number: 3957635
    Abstract: The invention is concerned with an improvement of the process and apparatus disclosed in British patent specification 1 070 251. Slids pass in countercurrent to a liquid through a number of stages. Liquid flow is cyclically pulsed so that during one part of a cycle the liquid flows upwardly, during another part the solids settle in the liquid and in still a further part solids pass between the stages and out of the last stage in countercurrent to the liquid flow. The improvement of the present invention is that the last stage is so valved that less solids can pass out of the system than can pass between the stages.
    Type: Grant
    Filed: January 23, 1974
    Date of Patent: May 18, 1976
    Assignee: National Institute of Metallurgy
    Inventors: Francis Louis Dirk Cloete, Alan Keith Haines