Patents by Inventor Edward Kempster

Edward Kempster 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).

  • Mining
    Patent number: 4019327
    Abstract: In a mine, pit dirt, after crushing if necessary, is mixed with bentonite and water to produce a sludge which is non-settling. The sludge is pumped through a pipe line to a point of utilization where it is fed into shuttering together with a setting agent to form a low quality concrete; this is used, for example, as a roof support in worked-out areas of the mine. The setting agent is preferably a mixture of cement and a water polyethylene oxide gel giving vary rapid setting.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: April 26, 1977
    Assignee: Thyssen (Great Britain) Limited
    Inventor: Edward Kempster