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Re: webpence post# 147089

Monday, 04/06/2015 10:47:09 PM

Monday, April 06, 2015 10:47:09 PM

Post# of 165854
Just saw your post with the links to the patents you were describing. Links repeated here:

"Between mid-1958 and early 1962 the CSM Research Foundation completed 23 reports on acid leaching and chlorination processes designed to extract high purity niobium metal and salts from the Chewett “ores”."

http://www.google.tl/patents/US3240557

This will answer most of my questions.