Show THE I 1 IE FLOTATION PROCESS all patent and other rights to this process in north america are now controlled by c MINERALS separation NORTH AMERICAN corporation on december 11 1916 the SUPREME COURT OF THE UNITED STATES 1 adjudged our basic patent for air froth flotation to be valid 2 holding that this patent covers any process of froth notation flotation wherein the results obtained are such results as are secured by the use of a fraction of one percent on oil the ore of an oily f frothing agent in an ore pulp with agitation three of the thirteen claims which specified the use of a small quantity of oil and which the court held to be invalid have bave since by proper disclaimer been brought within the scope of the supreme courts decision and at a recent trial in the united states district court at butte montana judge bourquin admitted these claims as amended on may 24 1917 the UNITED STATES CIRCUIT COURT OF APPEALS at philadelphia in the case of minerals separation ltd against miami copper company unanimously sustained the validity and broadly construed a second basic patent owned by us for the use of all soluble frothing agents in the same opinion the court also validated a third patent for the use of cresols and phenols phenois in the cold and without acid the def defendants end ants miami copper company endeavored to avoid infringement of these patents by using callow pneumatic cells but the court held that the operations of the def defendant company bif infringed ringed all three patents prospective users of our notation flotation processes are earnestly requested not to be misled by the mistaken views disseminated by interested parties that any of these BASIC PROCESS PATENTS can be evaded by a mere inere varia variation fion of apparatus for agitating and aerating the pulp or by the simple addition of oils or other materials in excess of a fraction of one percent on oil the acio weight lit of the ore treated NOTICE notice is hereby gilen that we will enforce our patents a and nd stop all infringements but are prepared to grant licenses for the right to use all or any of our processes to those who wish to use them to those who infringe or haue baue infringed our patents notice is gauen f that A settlement FOR SUCH infringement EMENT MUST PRECEDE THE GRANTING OF LICENSES FOR THE FUTURE USE OF SAME i that no one is authorized to introduce our notice is further giu gauen en processes or apparatus into the united states cana canada da or mexico all applications should be made direct to MINERALS separation NORTH AMERICAN CORP corporation corporation ORATIO N engineering office head office merchants exchange building 61 broadway san francisco california new york N Y y s |