Inventor · disambiguated record
Zongzhang Liu
Also filed as: LIU ZONGZHANG
4 granted patents·86 citations·filing 1994–1995
79Inventor score
Top patents by PatentIndex Score
4 records- 0186US5648561AProcess for the production of high purity and ultrapure bisphenol-ACHINA PETROCHEMICAL CORP·Filed 1994·Granted Jul 15, 1997·36 cites·25 claims
- 0278US5629457ADephenolizing process for production of high-quality polycarbonate grade bisphenol AUNIV TIANJIN·Filed 1994·Granted May 13, 1997·19 cites·11 claims
- 0373US5663456AMethod for obtaining large crystals with high purity by destructing part of fines in slurry in a crystallizerCHINA PETROCHEMICAL CORP·Filed 1994·Granted Sep 2, 1997·15 cites·15 claims
- 0447US5759942AIon exchange resin catalyst for the synthesis of bisphenols and the process for preparing the sameCHINA PETROCHEMICAL CORP·Filed 1995·Granted Jun 2, 1998·16 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →