Inventor
SONG ZHIGUO
CN16 patents
⚠️ This page may combine multiple inventors who share the name “SONG ZHIGUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MERCK & CO INC
9 patentsUS6127573AOct 3, 2000
Oxidaton of primary alcohols to carboxylic acids with a TEMPO catalyst using NaClO2 and NaClO
MERCK & CO INC27 citations91
US6031101AFeb 29, 2000
Oxidation process using tempo
MERCK & CO INC15 citations72
US5502165AMar 26, 1996
Process for peptide segment condensation
MERCK & CO INC5 citations67
US5777105AJul 7, 1998
Process for the preparation of imidazolyl macrolide immunosuppressants
MERCK & CO INC3 citations62
US6150554ANov 21, 2000
Oxidation process using periodic acid
MERCK & CO INC3 citations61
US5126456AJun 30, 1992
7-chloroquinaldine synthesis
MERCK & CO INC2 citations61
US6172231B1Jan 9, 2001
Oxidation process using periodic acid
MERCK & CO INC2 citations60
US5773575AJun 30, 1998
Process for peptide segment condensation
MERCK & CO INC4 citations60
US6046327AApr 4, 2000
Phosphate-mediated cyclization
MERCK & CO INC0 citations40
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD
4 patentsUS12429138B2Sep 30, 2025
Connection for valve seat and valve body unit
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD1 citations60
US11946558B2Apr 2, 2024
Valve body connection structure and valve assembly with valve body connection structure
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD0 citations51
US12473990B2Nov 18, 2025
Valve device
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD0 citations48
US12404941B2Sep 2, 2025
Combined four-way valve, air conditioning system and vehicle
ZHEJIANG DUNAN ARTIFICIAL ENV CO LTD0 citations48