Patents by Inventor Steven A. Craw

Steven A. Craw 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).

  • Hydrophobic filter material and method
    Patent number: 4731260
    Abstract: A filter material comprising hydrophobic filter media treated with a wetting agent which consists essentially of a material selected from the group consisting of polysobate 20, polysorbate 40, polysorbate 60 and polysorbate 80. The wetting agent is applied by dissolving it in a solvent and spraying the resulting solution onto the filter media.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: March 15, 1988
    Assignee: American Hospital Supply Corporation
    Inventors: David P. Balding, Li-Chien Hsu, Sun De Tong, Steven A. Craw