Show THE FLOTATION PROCESS all patent and other rights to this process in north america are now controlled by MINERALS separation NORTH AMERICAN corporation on december 11 1 the SUPREME COURT OP OF THE UNITED STATES adjudged our basic patent for air froth flotation to be valid holding that this patent covers any process of froth flotation wherein the results obtained are such results as are secured by the use of a f fraction of one percent on 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 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 fi frothing athing agents in the same opinion the court also validated a third patent for the use 0 of f c cresols r 0 sols and phenois phenols enols in the cold and without acid the def defendants end ants miami copper company endeavored to avoid infringement b of these patents by ush using callow pneumatic cells but the court held that the operations of the defendant comp company any infringed ed all three patents prospective users of our flotation processes are earnestly requested n not ot 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 variation of 0 f apparatus for agitating ao and aerating the pulp or by the simple addition of oils arother or other materials in in excess of a fraction of one percent on the ineil weight lit of the ore treated NOTICE notice is hereby gauen that we will enforce our patents and stop all infringements but are prep prepared ared to grant licenses for the right to use all who wish to use them thein or any of our processes to those to those wh who 0 infringe or haue baue infringed our patents notice is gauen infringement MUST PRECEDE THE GRANTING OF that A settlement FOR SUCH LICENSES FOR THE FUTURE USE OF SAME that no one is authorized to introduce our notice is further giu gauen en processes or apparatus int into 0 the united states canada or mexico all applications should be made direct to MINERALS separation TH AMERICAN corporation engineering office head office merchants exchange building 61 broadway san Franci francisco california new york N Y jill |