Inventor
KAMEYAMA YUTAKA
JP37 patents
⚠️ This page may combine multiple inventors who share the name “KAMEYAMA YUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTSUKA KAGAKU KK
32 patentsUS5693792ADec 2, 1997
β-lactam and cephem compounds and processes for their production
OTSUKA KAGAKU KK136 citations97
US5599925AFeb 4, 1997
Penam derivatives
OTSUKA KAGAKU KK29 citations91
US6576761B1Jun 10, 2003
Process for the preparation of cephem compounds
OTSUKA KAGAKU KK10 citations74
US6417351B1Jul 9, 2002
Process for producing 3-alkenylcephem compounds
OTSUKA KAGAKU KK12 citations74
US5656754AAug 12, 1997
Process for preparing cephem compounds
OTSUKA KAGAKU KK9 citations73
US4609438ASep 2, 1986
Process for preparing thiosulfonate derivatives
OTSUKA KAGAKU KK15 citations72
US5070194ADec 3, 1991
Method for production of β-lactam derivatives
OTSUKA KAGAKU KK10 citations70
US7183421B2Feb 27, 2007
Processes for producing oxide with higher oxidation than alcohol
OTSUKA KAGAKU KK2 citations63
US6797830B2Sep 28, 2004
Process for producing oxide with higher oxidation than alcohol
OTSUKA KAGAKU KK4 citations63
US6399770B1Jun 4, 2002
Preparation of β-hydroxy esters using ammonium borohydrides
OTSUKA KAGAKU KK3 citations63
US5968335AOct 19, 1999
Process for preparing 3-alkoxymethylcephem compounds
OTSUKA KAGAKU KK3 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
US4629542ADec 16, 1986
Process for preparing 3-exomethylenecepham derivatives
OTSUKA KAGAKU KK2 citations63
US4958018ASep 18, 1990
Method for production of 3-exomethylenecepham derivatives
OTSUKA KAGAKU KK3 citations62
US5470972ANov 28, 1995
Process for preparing examethylenecephem compounds
OTSUKA KAGAKU KK3 citations61
US6448393B1Sep 10, 2002
Process for producing 3-cephem compounds
OTSUKA KAGAKU KK0 citations52
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
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
US6887992B2May 3, 2005
3-cephem derivative crystal
OTSUKA KAGAKU KK0 citations45
US6420554B1Jul 16, 2002
Process for preparation of 3-cephem compound
OTSUKA KAGAKU KK1 citations42
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
US6339152B1Jan 15, 2002
Process for producing exo-methylenepenam compounds
OTSUKA KAGAKU KK0 citations41
OTSUKA CHEMICAL CO LTD
3 patentsUS7759483B2Jul 20, 2010
3-alkenylcephem compounds and process for production thereof
OTSUKA CHEMICAL CO LTD2 citations59
US7893254B2Feb 22, 2011
Process for production of 3-alkenylcephem compounds
OTSUKA CHEMICAL CO LTD0 citations52
US7692003B2Apr 6, 2010
Penicillin crystals and process for producing the same
OTSUKA CHEMICAL CO LTD0 citations52