Patents by Inventor Wilhelm E. Conradie

Wilhelm E. Conradie 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).

  • Wood preservatives
    Patent number: 5399190
    Abstract: A wood preservative composition including a mixture of two or more metallic soaps of long chain unsaturated fatty acids, which soaps have a metallic component selected from the group consisting of copper, zinc, chromium, iron, antimony, tin, cobalt, nickel, arsenic, boron, lead, magnesium, potassium and sodium, and a fatty acid component selected from two or more of the group consisting of oleic acid, linoleic acid, and linolenic acid, the composition being such that the ratio by mass of metallic soap of oleic acid:metallic soap of linoleic acid:metallic soap of linolenic acid is about 20-29:15-70:0-47.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: March 21, 1995
    Assignees: Shell South Africa (Pty.) Ltd., CSIR, Shell Research Ltd.
    Inventors: Wilhelm E. Conradie, Andrew J. Pendlebury, Antonio Pizzi, Denise Conradie