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Many companies such as Climator "http://www.climator.com/files/products/climsel-c58.pdf" resolve the supper cooling, conductivity, separation and other problems of sodium acetate trihydrate within passed 20 years. Why this patent "Publication number CN103666378 A" can certified?

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That document CN103666378 A is patent application submitted to China's patent office. The A at the end, by international convention, means it is a publication of an application. That document is not a granted patent. From its page at google/patents (reachable by the link on the right) it looks like it is the only publication so far.

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