Patents by Inventor William T. Rule

William T. Rule 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).

  • Recovery of copper from copper oxide minerals
    Patent number: 4324654
    Abstract: A method of recovering copper from ores containing copper as atacamite/paratacamite by froth flotation is described which comprises utilizing as a collecting or flotation agent, a combination of two chelating agents having the formulaR--C(OH).dbd.N--OR.sup.1andR.sup.2 OCSSXwherein R is an aliphatic or aromatic group containing from 5 to 10 carbon atoms,R.sup.1 is hydrogen or an alkali metal,R.sup.2 is an alkyl group containing up to 10 carbon atoms, andX is an alkali metal.The method of the invention is useful in treating copper ores containing very small percentages by weight of copper.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: April 13, 1982
    Assignee: The Hanna Mining Company
    Inventor: William T. Rule
  • Recovery of copper from copper oxide minerals
    Patent number: 4214983
    Abstract: A method of recovering copper from ores containing copper as atacamite/paratacamite by froth flotation is described which comprises utilizing as a promoter collector compounds having the formulaRC(OH).dbd.N--O.sup..crclbar. H.sub.2 N.sup..sym. R.sup.1 R.sup.2whereinR is an aliphatic group containing from about five to ten carbon atoms or an aromatic group containing from six to about ten carbon atoms, andR.sup.1 and R.sup.2 are each independently alkyl groups containing from one to five carbon atoms.The method of the invention is useful in treating copper ores containing very small percentages by weight of copper.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: July 29, 1980
    Assignee: The Hanna Mining Company
    Inventor: William T. Rule