Patents by Inventor Graham J. Gwilliam

Graham J. Gwilliam 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 of removing asbestos by inserting a hollow needle having a closed pointed end
    Patent number: 5240508
    Abstract: The apparatus comprises one or more hollow needles 10 for insertion into asbestos to be removed and a source of pressurised liquid connected to the inside of the or each needle. The or each needle has a maximum cross-sectional dimension which is not greater than 4 mm, a closed pointed end 12 and a peripheral wall provided with one or more apertures 13 for discharging liquid fed to the inside of the needle into the asbestos to be removed.
    Type: Grant
    Filed: May 21, 1991
    Date of Patent: August 31, 1993
    Inventor: Graham J. Gwilliam