Patents by Inventor Warren H. Dale

Warren H. Dale 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).

  • Apparatus and method for automated injection of trees with a treating liquid
    Patent number: 4176495
    Abstract: Apparatus and method for drilling a borehole into the sapwood of a tree and injecting a chemical solution into the borehole, preferably during withdrawal of the drill bit, including facilities for supplying a liquid through a passageway within the bit and facilities for injecting a quantity of liquid, proportional to the volume of the borehole and allocated simultaneously with and in response to progression of the drill bit, into the borehole as the drill bit is being withdrawn therefrom.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: December 4, 1979
    Assignee: Hercules Incorporated
    Inventor: Warren H. Dale