Patents by Inventor Harold W. Nuttall

Harold W. Nuttall 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).

  • Molten salt method of producing fire resistant wood articles
    Patent number: 3935343
    Abstract: Hardboard and other wood articles are made fire resistant by immersing the wood in a molten ammonium phosphate salt batn, preferably monoammonium phosphate.
    Type: Grant
    Filed: February 21, 1974
    Date of Patent: January 27, 1976
    Assignee: United States Gypsum Company
    Inventor: Harold W. Nuttall