Show PATENTS RECENTLY ISSUED reported specially for the salt lake mining review by R W bishop patent attorney washington DC utilizing waste heat in connection with siv elting furnaces richard brown southampton england process of obtaining zinc E EH H hopkins south kensington england process ot of making sodium cyanide fritz roessler frankfort on the main germany assignor to roessler hasslacher chemical co new york N NY Y furnace george westinghouse pittsburg pa chanid compound george erlwein and albert frank berlin germany zinc furnace W C wetherill joplin mo apparatus for extracting metals from ores john randall deadwood S D stone or ore crusher D C robinson monessen moncessen Mo nessen pa treatment of ore slimes H L sulman and H P F kirkpatrick sicard london england apparatus for separating metals from ores vv A R loose provo utah trap for amalgam G R tuttle grass valley cal ore roasting apparatus A M bean denver colo roaster J A ogden philadelphia pa assignor of one third to C H cornell valentine neb melting furnace E H schwartz chicago ill assignor of two thirds to hawley down draft furnace co same place method of melting metals EA E A schwartz chicago ill assignor to hawley down draft furnace co same place ore roasting and fume saving apparatus W H motter denver colo rock drill J JG G leyner denver colo and treatment of telluride gold ores walter london england ore leaching apparatus james brown tonopah To nev rock drill arili russell avery sausalito Sau cal assignor to avery drill co sari san francisco cal treatment of nickel and nickel copper ores camillo perron rome italy match safe attachment for miners lamps J A brown pictou colo assignor of one half to G M same place |