Patents by Inventor Ian Robert Kennedy Greig

Ian Robert Kennedy Greig 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).

  • Glass fiber reinforced cement composite materials
    Patent number: 4093471
    Abstract: Glass fiber reinforced cement composite materials are made by first preparing a cement slurry from a cement/water mix by a high shear mixing process which breaks up cement agglomerates into their primary particles, and then mixing chopped strands of glass fiber into the cement slurry by a low shear mixing process which restricts damage to the glass filaments to a minimum. Both the high shear and low shear processes may be carried out in the same impeller-type mixer using different power inputs and impeller speeds.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: June 6, 1978
    Assignee: Pilkington Brothers Limited
    Inventor: Ian Robert Kennedy Greig