Patents by Inventor Michael John Sole

Michael John Sole 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).

  • Extracting copper from sulphide concentrates
    Patent number: 4058395
    Abstract: In a process for extracting copper from copper-containing sulphide concentrates the concentrate is roasted to reduce the sulphur content below 1% by weight and the roasted material is then segregated in a conventional segregation process. A silica-containing substance, such as washed river sand, is added to the roasted material to bring the silica content up to about 30% and the copper content to below 30% before feeding the material to the segregation process.
    Type: Grant
    Filed: September 3, 1976
    Date of Patent: November 15, 1977
    Inventor: Michael John Sole