Assignee
ZHANG ZHENGFENG
CN·2 granted patents·3 citations·filing 2009–2013
Top patents by PatentIndex Score
2 records- 0158US8277700B2Process for preparing a photochromic polymeric composition, thus obtained polymeric composition and use thereofZHANG ZHENGFENG·Filed 2009·Granted Oct 2, 2012·3 cites·18 claims
- 0243US9290431B2Process for preparation of highly pure, non-yellowing methacrylic acidZHANG ZHENGFENG·Filed 2013·Granted Mar 22, 2016·0 cites·9 claims
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