Patents by Inventor Geoffrey R. Long

Geoffrey R. Long 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).

  • Settable mineral clinker compositions
    Patent number: 4798628
    Abstract: A settable cementitious composition is produced by mixing a ground mineral composition containing the phase 4CaO.3Al.sub.2 O.sub.3.SO.sub.3, in the presence of water, with a source of alkali metal or alkaline earth metal under alkaline conditions. In the pump packing method of stowing cavities in underground mines, an aqueous slurry of the mineral composition is mixed with a second slurry containing calcium sulfate, lime and, preferably, bentonite, an alkali metal sulfate and a setting and/or hardening accelerator. The components may be provided initially as a dry mixture. A preferred mineral composition comprises at least 15% by weight of 4CaO.3Al.sub.2 O.sub.3.SO.sub.3, less than 1% by weight of free lime, less than 25% by weight of CaO.2Al.sub.2 O.sub.3 and not more than 10% by weight of 12CaO.7Al.sub.2 O.sub.3.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: January 17, 1989
    Assignee: Blue Circle Industries PLC
    Inventors: Peter S. Mills, Geoffrey R. Long