Patents by Inventor David M. Findlay, deceased

David M. Findlay, deceased 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).

  • Wood treatment composition
    Patent number: 4929454
    Abstract: The present invention relates to a method of preserving wood material and rendering said wood material resistant to biological deterioration, by impregnating a wood material with a composition comprising an aqueous ammoniacal solution of copper and quaternary ammonium compounds. The invention also embraces the product resulting therefrom.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: May 29, 1990
    Assignee: Domtar Inc.
    Inventors: David M. Findlay, deceased, Neil G. Richardson