Patents by Inventor W. Laurie Douglas

W. Laurie Douglas 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).

  • Polyolefin drums
    Patent number: 6047828
    Abstract: Polyolefin drums in which the olefin polymer has been nucleated with from 1,500 to 10,000 ppm based on the weight of the polyolefin of a nucleating agent which is a dibenzylidene derivative of sorbitol or xylitol can, when full of liquid, withstand a drop of at least 10 feet without failure.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: April 11, 2000
    Inventors: Henry F. Hay, W. Laurie Douglas, James Jeffrey Preece, Mark Aubee, Nancy Conley