Inventor
KASAI MASAJI
JP43 patents
⚠️ This page may combine multiple inventors who share the name “KASAI MASAJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KYOWA HAKKO KOGYO KK
41 patentsUS5084468AJan 28, 1992
Dc-88a derivatives
KYOWA HAKKO KOGYO KK156 citations99
US4877776AOct 31, 1989
K-252 compounds
KYOWA HAKKO KOGYO KK51 citations96
US4691024ASep 1, 1987
New mitomycin derivatives, preparation thereof and pharmaceutical compositions containing them
KYOWA HAKKO KOGYO KK87 citations96
US5117006AMay 26, 1992
Dc-88a derivatives useful as antitumor agents
KYOWA HAKKO KOGYO KK43 citations92
US5138059AAug 11, 1992
Dc-89 compounds and process for their preparation
KYOWA HAKKO KOGYO KK44 citations91
US5380934AJan 10, 1995
Process for producing alanylgutamine
KYOWA HAKKO KOGYO KK25 citations89
US5468474ANov 21, 1995
N-acylglutamine derivatives and cosmetic compositions
KYOWA HAKKO KOGYO KK18 citations81
US5952355ASep 14, 1999
Propenone derivatives
KYOWA HAKKO KOGYO KK18 citations80
US5068349ANov 26, 1991
Mitomycin derivatives
KYOWA HAKKO KOGYO KK8 citations74
US4992551AFeb 12, 1991
DC-52 derivatives
KYOWA HAKKO KOGYO KK5 citations74
US4849136AJul 18, 1989
Process for producing 7-amino-6-demethyl-6-deoxytetracycline
KYOWA HAKKO KOGYO KK10 citations74
US4395558AJul 26, 1983
9-Epi-mitomycin B and D compounds
KYOWA HAKKO KOGYO KK15 citations73
US4374774AFeb 22, 1983
Mitomycins
KYOWA HAKKO KOGYO KK6 citations73
US4522812AJun 11, 1985
Novel physiologically active substance K-4, a process for preparation thereof and a pharmaceutical composition containing the same
KYOWA HAKKO KOGYO KK7 citations71
US5550283AAug 27, 1996
Process for producing alanylglutamine
KYOWA HAKKO KOGYO KK10 citations70
US5071984ADec 10, 1991
Dc-52 derivatives
KYOWA HAKKO KOGYO KK2 citations63
US5011854AApr 30, 1991
Hydroxamic acid derivatives and use thereof in combatting lipoxygenase-mediated diseases
KYOWA HAKKO KOGYO KK5 citations63
US4880825ANov 14, 1989
Mitomycin derivatives
KYOWA HAKKO KOGYO KK6 citations63
US4771068ASep 13, 1988
Mitomycin derivatives having anti-tumor and antibacterial utility
KYOWA HAKKO KOGYO KK3 citations63
US5334611AAug 2, 1994
6-ethyl mitomycin derivatives
KYOWA HAKKO KOGYO KK4 citations62
US5256685AOct 26, 1993
Mitomycin derivatives
KYOWA HAKKO KOGYO KK3 citations62
US4820824AApr 11, 1989
Mitomaycin compounds
KYOWA HAKKO KOGYO KK2 citations62
US4393056AJul 12, 1983
Antibiotics tetronolide compounds and process for production thereof
KYOWA HAKKO KOGYO KK3 citations62
US5539112AJul 23, 1996
5-aminoflavone derivatives
KYOWA HAKKO KOGYO KK2 citations61
US4346075AAug 24, 1982
Antibiotic DC-11 and process for production thereof
KYOWA HAKKO KOGYO KK4 citations61
US5780677AJul 14, 1998
Process for producing glutamine derivative
KYOWA HAKKO KOGYO KK4 citations60
US5585488ADec 17, 1996
Process for producing indolocarbazole derivatives
KYOWA HAKKO KOGYO KK2 citations60
US4296040AOct 20, 1981
Antibiotic nanaomycin E and a process for producing the same
KYOWA HAKKO KOGYO KK1 citations60
US6197998B1Mar 6, 2001
Process for producing N-glycyltyrosine and its crystal structure
KYOWA HAKKO KOGYO KK5 citations59
US4264504AApr 28, 1981
Mitomycin derivatives
KYOWA HAKKO KOGYO KK5 citations56
US5218126AJun 8, 1993
Halogen substituted mitomycin derivatives
KYOWA HAKKO KOGYO KK0 citations52
US5180825AJan 19, 1993
Mitomycin derivatives
KYOWA HAKKO KOGYO KK1 citations52
US5021423AJun 4, 1991
Mitomycin derivatives and intermediates therefor
KYOWA HAKKO KOGYO KK0 citations52
US4853385AAug 1, 1989
7-N,8-N-Ethylenemitomycin 8-imines
KYOWA HAKKO KOGYO KK0 citations52
US4748251AMay 31, 1988
7-n-aminomethylenemitomycin derivative
KYOWA HAKKO KOGYO KK0 citations52
US4733000AMar 22, 1988
Optially active 1-amino-2-(4-hydroxyphenyl)ethylphosphonic acid and derivatives thereof
KYOWA HAKKO KOGYO KK0 citations52
US4683220AJul 28, 1987
Novel physiologically active substances K-26, a process for preparation thereof and a pharmaceutical composition containing the same
KYOWA HAKKO KOGYO KK0 citations52
US5220026AJun 15, 1993
Pyrazoloacridone derivatives
KYOWA HAKKO KOGYO KK1 citations51
US5344938ASep 6, 1994
Indole 3-carboxylic acid derivatives
KYOWA HAKKO KOGYO KK1 citations50
US4353986AOct 12, 1982
Process for producing antibiotic nanaomycin E
KYOWA HAKKO KOGYO KK0 citations50
US5756823AMay 26, 1998
Glutathione monoester sulfonate
KYOWA HAKKO KOGYO KK0 citations48