Patents by Inventor Joseph W. Cook

Joseph W. Cook 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).

  • Rigid fiberboard
    Patent number: 5346930
    Abstract: A rigid fiberboard suitable as a replacement for the natural woods presently used for the manufacture of pencils is provided. The fiberboard essentially comprises a fiber network, together with a filler and binder. A lubricant is added to improve the sharpening characteristics of the fiberboard, and dimensional stability is preserved by incorporating a waterproofing agent to minimize the absorption of water by the fiber network.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: September 13, 1994
    Assignee: Lydall, Inc.
    Inventors: Richard L. Maine, Joseph W. Cook