Patents by Inventor Dennis L. Hardesty

Dennis L. Hardesty 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).

  • Method for the production of high density fiberboard
    Patent number: 4634498
    Abstract: High strength and high density wood fiberboard is formed by treating the wood fiber source material with a highly alkaline solution, such as sodium hydroxide solution, before interfelting the fibers into a loose mat. The wood source material may be treated after refining the material into fibers, but preferably, the wood source material is treated before fibrillation. Further, wood fiber source material may be partially neutralized before felting without substantial change in the resulting densities and strengths.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: January 6, 1987
    Assignee: United States Gypsum Company
    Inventors: Dennis L. Hardesty, Timothy D. Hanna, Frank J. Wendt, Kendall D. White, Jr.