Patents by Inventor Geoffrey F. Warren

Geoffrey F. Warren 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).

  • Process for producing magnesium
    Patent number: 4572736
    Abstract: Magnesium is produced by carbothermic conversion of magnesia in a process which comprises effecting the reaction in the presence of a liquid slag comprising oxides or mixed oxides and carbides of magnesium, calcium and aluminium in relative weight proportions, calculated as atomic metal:metal ratios, which by continued introduction of appropriate feedstock into the reactor are being kept within the following ranges(i) Mg:Ca from 0.28:1 to 1.34:1(ii) Al:Mg from 0.79:1 to 3.16:1(iii) Ca:Al from 0.48:1 to 1.50:1under the proviso that the total amount gramatom aluminium is less than 51% of the total amount gramatoms aluminium, calcium and magnesium contained in the slag.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: February 25, 1986
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: Geoffrey F. Warren, Andrew M. Cameron