US Patent 7351869 Crystallization method for purification of calcipotriene
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Patent Inventor Names
Anchel Schwartz0
Asher Maimon0
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Patent abstract
Provided is a crystallization method for reducing the level of impurities in calcipotriene in which a solution of a starting calcipotriene in a first process solvent, for example THF, is combined with second process solvent, for example methyl formate, and, after cooling, calcipotriene is isolated. The method can include a slurry step for reducing the level of residual first process solvent.
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US Patent 07351869 Crystallization method for purification of calcipotriene US Patent 7351869 Crystallization method for purification of calcipotriene
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Patent Number
073518690
Patent Number
73518690
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Patent Jurisdiction
Patent Number
073518690
Date of Patent
April 1, 2008
0Patent Application Number
107171480
Date Filed
November 18, 2003
0Official Website
Patent Primary Examiner
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US Patent 07351869 Crystallization method for purification of calcipotriene
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Is a
Patent jurisdiction
Patent number
07351869
Date of patent
April 1, 2008
Patent application number
10717148
Date Filed
November 18, 2003
Patent primary examiner
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