Robert A French
Burglar Alarm in Salt Lake City, UT
License number
Utah 326765-8009
Issued Date
Aug 13, 1996
Expiration Date
Nov 13, 1996
Category
Burglar Alarm
Type
Temporary Burglar Alarm Company Agent
Address
Address
Salt Lake City, UT
Professional information
Removal Of Arsenic, Antimony And Bismuth From Molten Copper With Sulfur Hexafluoride
US Patent:
4010030, Mar 1, 1977
Filed:
Sep 8, 1975
Appl. No.:
5/611154
Inventors:
Robert O. French - Salt Lake City UT
Assignee:
Kennecott Copper Corporation - New York NY
International Classification:
C22B 1500
US Classification:
75 76
Abstract:
Bismuth, antimony, and arsenic impurities are removed from molten copper by contacting such molten copper with sulfur hexafluoride gas, which reacts directly with the specified impurities to form gaseous fluorides.