Patents by Inventor Alfredo P. Vargas

Alfredo P. Vargas 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 the selective separation of base metal sulfides and oxides contained in an ore
    Patent number: 4650569
    Abstract: The present invention comprises a process for the separation of ore components by flotation comprising: grinding ore to form pulp, mixing said pulp with sulfide ions and cyanide ions, adjusting the concentration of said sulfide ions to a level at least sufficient to cause depression of base metal mixed sulfides but insufficient to cause substantial activation of pyrites, and adjusting the concentration of said cyanide ions to a level at least sufficient to cause auxiliary depression of the mineral components of said ore which are required to be depressed in said flotation, but insufficient to cause overdepression of said mineral components; said sulfide ions and cyanide ions having been introduced to said pulp at predetermined times and in a predetermined sequence.
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: March 17, 1987
    Assignee: South American Placers, Inc.
    Inventor: Alfredo P. Vargas
  • Process for the selective separation of base metal sulfides and oxides contained in an ore
    Patent number: 4515688
    Abstract: The present invention comprises a process for the separation of ore components by flotation comprising: grinding ore to form pulp, mixing said pulp with sulfide ions and cyanide ions, adjusting the concentration of said sulfide ions to a level at least sufficient to cause depression of base metal mixed sulfides but insufficient to cause substantial activation of pyrites, and adjusting the concentration of said cyanide ions to a level at least sufficient to cause auxiliary depression of the mineral components of said ore which are required to be depressed in said flotation, but insufficient to cause overdepression of said mineral components; said sulfide ions and cyanide ions having been introduced to said pulp at predetermined times and in a predetermined sequence.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: May 7, 1985
    Assignee: South American Placers, Inc.
    Inventor: Alfredo P. Vargas