Patents by Inventor David P. Rickman

David P. Rickman 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).

  • Disposable column
    Patent number: 4190542
    Abstract: An internally smooth disposable column, of various sizes up to 800 ml. internal volume, made of biocompatible polymer is filled with particulate absorbent, e.g. carbon coated with polyHEMA, between support means located as close as practicable to inlet and outlet. L/D ratio is usually 1.5:1-5:1. Various shapes e.g. double frustoconical or trochoid of revolution are proposed for the column, which is preferably symmetrical to facilitate moulding of identical column halves; these shapes usually converge to meet a funnel-shaped connecting piece at inlet and outlet.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: February 26, 1980
    Assignee: Smith & Nephew Research Ltd.
    Inventors: Martin E. Hodgson, Graham D. Munro, David P. Rickman, Jack Fennimore