Could just mean the patent can't be registered in Spain.
I found this online:
http://www.google.ca/patents/US3189407
Patent registered in the US in 1965 (not sure if still in force), covers leaching Li from lepidolite using dilute sulphuric acid at temperatures of 140-200C. Opex would be impacted by heating, but far less than roasting at +800C.
Efficient and cost-effective Li extraction is the key to unlocking Cinovec's value. I look forward to the company providing updates on processing alternatives in the near future.
Could just mean the patent can't be registered in Spain. I found...
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