Fengfeng YAN

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Zhejiang, CN

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Patents Grantslast 30 patents

Information Patent Grant
Preparation method for levetiracetam intermediate
- Patent number 12,227,476
- Issue date Feb 18, 2025
- Zhejiang Huahai Pharmaceutical Co., Ltd.
- Bingxin Liu
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
High-Purity Losartan Potassium and Preparation Method Therefor
- Publication number 20250115584
- Publication date Apr 10, 2025
- Zhejiang Huahai Pharmaceutical Co., Ltd.
- Shengjun Li
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Method for Preparing High-Purity Losartan
- Publication number 20250051311
- Publication date Feb 13, 2025
- Zhejiang Huahai Pharmaceutical Co., Ltd.
- Xian Yang
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PREPARATION METHOD FOR LEVETIRACETAM INTERMEDIATE
- Publication number 20220162165
- Publication date May 26, 2022
- Zhejiang Huahai Pharmaceutical Co., Ltd.
- Bingxin LIU
- C07 - ORGANIC CHEMISTRY