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Patents

One entry per invention. Patent families filed in the US, EP, WO and CN offices.

Pure organic dyestuff and dyestuff sensitization solar energy battery prepared therefrom
CN 101240117 BApplicant: CHANGCHUN APPLIED CHEMISTRYPriority: 2008
CN
Method for syncretizing protein employing composite chromatography medium purification
CN 101318991 AApplicant: CHEN ZHINANPriority: 2008
CN
Method for producing electronic-grade pyromellitic dianhydride from secondary trapped coarse anhydride
CN 101580509 BApplicant: CHANGSHU LIANBANG CHEMICAL INDUSTRY CO LTDPriority: 2009
CN
Adsorbent for separating high-purity bromopyridine and preparation method thereof
CN 120571568 AApplicant: DANYANG HENGAN CHEMICAL SCIENCE AND TECH INSTITUTE CO LTDPriority: 2025
CN