Inventor
SASAOKA MICHIO
JP54 patents
⚠️ This page may combine multiple inventors who share the name “SASAOKA MICHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTSUKA KAGAKU KK
35 patentsUS4898654AFeb 6, 1990
Method of producing optically active β-lactam derivatives
OTSUKA KAGAKU KK71 citations96
US4912213AMar 27, 1990
Process for preparing penicillanic acid derivatives
OTSUKA KAGAKU KK21 citations81
US5656754AAug 12, 1997
Process for preparing cephem compounds
OTSUKA KAGAKU KK9 citations73
US5476913ADec 19, 1995
Polymerizable monomer, polymer thereof and process for preparing same
OTSUKA KAGAKU KK14 citations72
US4609438ASep 2, 1986
Process for preparing thiosulfonate derivatives
OTSUKA KAGAKU KK15 citations72
US4604457AAug 5, 1986
2-substituted cephem derivatives and process for preparing the same
OTSUKA KAGAKU KK9 citations72
US4925934AMay 15, 1990
Process for preparation of beta-lactam derivatives
OTSUKA KAGAKU KK18 citations71
US5070194ADec 3, 1991
Method for production of β-lactam derivatives
OTSUKA KAGAKU KK10 citations70
US5968335AOct 19, 1999
Process for preparing 3-alkoxymethylcephem compounds
OTSUKA KAGAKU KK3 citations63
US5770729AJun 23, 1998
Ozonide reducing agent
OTSUKA KAGAKU KK2 citations63
US5204458AApr 20, 1993
Process for preparing cephem derivatives
OTSUKA KAGAKU KK6 citations63
US5196530AMar 23, 1993
Process for preparing 2-exo-methylenepenam derivatives
OTSUKA KAGAKU KK5 citations63
US5126447AJun 30, 1992
Process for preparation of β-lactam derivative from an alkenyl substituted β-lactam derivative using a ruthenium or rhenium catalyst and a periodic acid
OTSUKA KAGAKU KK2 citations63
US4798890AJan 17, 1989
Process for preparation of azetidinone derivatives
OTSUKA KAGAKU KK4 citations63
US4629542ADec 16, 1986
Process for preparing 3-exomethylenecepham derivatives
OTSUKA KAGAKU KK2 citations63
US5587464ADec 24, 1996
Process for producing diazomethane derivatives
OTSUKA KAGAKU KK3 citations62
US4958018ASep 18, 1990
Method for production of 3-exomethylenecepham derivatives
OTSUKA KAGAKU KK3 citations62
US4886891ADec 12, 1989
Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative
OTSUKA KAGAKU KK3 citations62
US4599151AJul 8, 1986
Process for preparing 2,2-bishalomethylpenam derivatives
OTSUKA KAGAKU KK2 citations61
US5247054ASep 21, 1993
Organic polymer ferromagnetic material and process for preparing polymer
OTSUKA KAGAKU KK4 citations57
US6043356AMar 28, 2000
Process for preparing β-lactam compound
OTSUKA KAGAKU KK1 citations52
US6011151AJan 4, 2000
Process for preparing β-lactam halide compound
OTSUKA KAGAKU KK0 citations52
US5977352ANov 2, 1999
Process for preparing 3-norcephem compounds
OTSUKA KAGAKU KK0 citations52
US5905147AMay 18, 1999
Process for preparing β-lactam compound
OTSUKA KAGAKU KK0 citations52
US5206361AApr 27, 1993
Thiazolinoazetidinone derivative
OTSUKA KAGAKU KK1 citations52
US5142040AAug 25, 1992
Process for preparing a 3-formylcephem derivative
OTSUKA KAGAKU KK0 citations52
US4665166AMay 12, 1987
Process for preparing cephalosporin compounds
OTSUKA KAGAKU KK1 citations51
US4656264AApr 7, 1987
Bicyclic azetidinone intermediates
OTSUKA KAGAKU KK1 citations51
US6150519ANov 21, 2000
Process for preparing β-lactam derivatives
OTSUKA KAGAKU KK0 citations50
US5929233AJul 27, 1999
Cyclization for preparing halo-cephems
OTSUKA KAGAKU KK1 citations50
US5919924AJul 6, 1999
Process for preparing 3-halogenated cephem derivative
OTSUKA KAGAKU KK0 citations48
US6063918AMay 16, 2000
Process for preparing 2-isocephem derivatives
OTSUKA KAGAKU KK0 citations47
US5688942ANov 18, 1997
Process for preparing 2-isocephem derivatives
OTSUKA KAGAKU KK0 citations47
US6197185B1Mar 6, 2001
Process for preparing beta lactam compound
OTSUKA KAGAKU KK0 citations42
US5986091ANov 16, 1999
Process for preparation of β-lactam compounds
OTSUKA KAGAKU KK0 citations42
OTSUKA KAGAKU YAKUHIN
14 patentsUS4784734ANov 15, 1988
Azetidinone derivatives and process for the preparation of the same
OTSUKA KAGAKU YAKUHIN49 citations92
US4689411AAug 25, 1987
4-thio azetidinone intermediates and process for the preparation of the same
OTSUKA KAGAKU YAKUHIN12 citations73
US4482491ANov 13, 1984
Thiazolinoazetidinone derivatives and process for the preparation of the same
OTSUKA KAGAKU YAKUHIN7 citations73
US4853468AAug 1, 1989
Process for the preparation of cephem derivatives
OTSUKA KAGAKU YAKUHIN5 citations62
US4603014AJul 29, 1986
Thiazolinoazetidinone derivatives and process for the preparation of the same
OTSUKA KAGAKU YAKUHIN2 citations62
US4566996AJan 28, 1986
Process for preparing azetidinone derivatives
OTSUKA KAGAKU YAKUHIN4 citations62
US4499265AFeb 12, 1985
Process for preparing 3-exo-methylenecepham derivatives
OTSUKA KAGAKU YAKUHIN3 citations62
US4464237AAug 7, 1984
Process for preparing β-lactam derivatives
OTSUKA KAGAKU YAKUHIN6 citations62
US4392923AJul 12, 1983
Process for preparing thiazolinozetidinone derivatives
OTSUKA KAGAKU YAKUHIN2 citations62
US4789740ADec 6, 1988
Halogenation process for preparing 2-(oxoazetidinyl)-3-chloromethyl-3-butenoate
OTSUKA KAGAKU YAKUHIN2 citations61
US4810788AMar 7, 1989
Azetidinone disulfide derivatives and a process for preparing the same
OTSUKA KAGAKU YAKUHIN3 citations60
US4401528AAug 30, 1983
Process for preparing 2-oxycephalosporin derivatives
OTSUKA KAGAKU YAKUHIN0 citations52
US4379032AApr 5, 1983
Process for preparing oxazolineazetidinone derivatives
OTSUKA KAGAKU YAKUHIN1 citations52
US4801720AJan 31, 1989
Azetidinone disulfides and a ring opening process for preparing the same
OTSUKA KAGAKU YAKUHIN0 citations50
OTSUKA KAGAKU KASBUSHIKI KAISH
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