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Legal status
Patent not validated
| (51) | INT.CL. | C07J 53/00 |
| (11) | Number of the document | 2548881 |
| (13) | Kind of document | T |
| (96) | European patent application number | 10847665.6 |
| Date of filing the European patent application | 2010-03-16 | |
| (97) | Date of publication of the European application | 2013-01-23 |
| (45) | Date of publication and mention of the grant of the patent | 2014-12-17 |
| (46) | Date of publication of the claims translation |
| (86) | Number | PCT/CN2010/071074 |
| Date | 2010-03-16 |
| (87) | Number | WO 2011/113196 |
| Date | 2011-09-22 |
| (72) |
WANG, Jiazhen, CN
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| (73) |
Taizhou Taifa Pharmaceuticals Co., Ltd,
No. 14 Industrial East Road Xianjv Taizhou, Zhejiang 317300,
CN
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| (54) | PREPARATION METHOD OF DROSPIRENONE |
| PREPARATION METHOD OF DROSPIRENONE |