Inventor · disambiguated record
Masaji Kasai
Also filed as: KASAI MASAJI
43 granted patents·559 citations·filing 1979–2013
98Inventor score
Top patents by PatentIndex Score
43 records- 0198US5084468ADc-88a derivativesKYOWA HAKKO KOGYO KK·Filed 1989·Granted Jan 28, 1992·156 cites·10 claims
- 0293US4691024ANew mitomycin derivatives, preparation thereof and pharmaceutical compositions containing themKYOWA HAKKO KOGYO KK·Filed 1986·Granted Sep 1, 1987·87 cites·5 claims
- 0392US5138059ADc-89 compounds and process for their preparationKYOWA HAKKO KOGYO KK·Filed 1989·Granted Aug 11, 1992·44 cites·1 claims
- 0491US5117006ADc-88a derivatives useful as antitumor agentsKYOWA HAKKO KOGYO KK·Filed 1991·Granted May 26, 1992·43 cites·3 claims
- 0589US4877776AK-252 compoundsKYOWA HAKKO KOGYO KK·Filed 1988·Granted Oct 31, 1989·51 cites·15 claims
- 0685US4395558A9-Epi-mitomycin B and D compoundsKYOWA HAKKO KOGYO KK·Filed 1981·Granted Jul 26, 1983·15 cites·4 claims
- 0783US5380934AProcess for producing alanylgutamineKYOWA HAKKO KOGYO KK·Filed 1993·Granted Jan 10, 1995·25 cites·2 claims
- 0873US4849136AProcess for producing 7-amino-6-demethyl-6-deoxytetracyclineKYOWA HAKKO KOGYO KK·Filed 1988·Granted Jul 18, 1989·10 cites·7 claims
- 0972US8633001B2Process for producing optically active succinimide derivatives and intermediates thereofKASAI MASAJI·Filed 2010·Granted Jan 21, 2014·2 cites·13 claims
- 1070US5952355APropenone derivativesKYOWA HAKKO KOGYO KK·Filed 1996·Granted Sep 14, 1999·18 cites·26 claims
- 1164US4880825AMitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1988·Granted Nov 14, 1989·6 cites·7 claims
- 1261US4264504AMitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1979·Granted Apr 28, 1981·5 cites·5 claims
- 1360US4522812ANovel physiologically active substance K-4, a process for preparation thereof and a pharmaceutical composition containing the sameKYOWA HAKKO KOGYO KK·Filed 1982·Granted Jun 11, 1985·7 cites·2 claims
- 1458US5068349AMitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1989·Granted Nov 26, 1991·8 cites·3 claims
- 1558US5011854AHydroxamic acid derivatives and use thereof in combatting lipoxygenase-mediated diseasesKYOWA HAKKO KOGYO KK·Filed 1989·Granted Apr 30, 1991·5 cites·7 claims
- 1658US4374774AMitomycinsKYOWA HAKKO KOGYO KK·Filed 1980·Granted Feb 22, 1983·6 cites·5 claims
- 1757US9434737B2Process for producing optically active succinimide derivatives and intermediates thereofDAINIPPON SUMITOMO PHARMA CO·Filed 2013·Granted Sep 6, 2016·0 cites·8 claims
- 1857US5334611A6-ethyl mitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1993·Granted Aug 2, 1994·4 cites·2 claims
- 1955US5468474AN-acylglutamine derivatives and cosmetic compositionsKYOWA HAKKO KOGYO KK·Filed 1993·Granted Nov 21, 1995·18 cites·8 claims
- 2055US4992551ADC-52 derivativesKYOWA HAKKO KOGYO KK·Filed 1989·Granted Feb 12, 1991·5 cites·1 claims
- 2151US5550283AProcess for producing alanylglutamineKYOWA HAKKO KOGYO KK·Filed 1994·Granted Aug 27, 1996·10 cites·2 claims
- 2251US5256685AMitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1992·Granted Oct 26, 1993·3 cites·14 claims
- 2351US4771068AMitomycin derivatives having anti-tumor and antibacterial utilityKYOWA HAKKO KOGYO KK·Filed 1986·Granted Sep 13, 1988·3 cites·6 claims
- 2449US5780677AProcess for producing glutamine derivativeKYOWA HAKKO KOGYO KK·Filed 1997·Granted Jul 14, 1998·4 cites·1 claims
- 2549US4346075AAntibiotic DC-11 and process for production thereofKYOWA HAKKO KOGYO KK·Filed 1981·Granted Aug 24, 1982·4 cites·4 claims
- 2645US6197998B1Process for producing N-glycyltyrosine and its crystal structureKYOWA HAKKO KOGYO KK·Filed 1999·Granted Mar 6, 2001·5 cites·18 claims
- 2744US4820824AMitomaycin compoundsKYOWA HAKKO KOGYO KK·Filed 1987·Granted Apr 11, 1989·2 cites·6 claims
- 2842US4393056AAntibiotics tetronolide compounds and process for production thereofKYOWA HAKKO KOGYO KK·Filed 1981·Granted Jul 12, 1983·3 cites·2 claims
- 2941US5585488AProcess for producing indolocarbazole derivativesKYOWA HAKKO KOGYO KK·Filed 1995·Granted Dec 17, 1996·2 cites·3 claims
- 3040US5539112A5-aminoflavone derivativesKYOWA HAKKO KOGYO KK·Filed 1995·Granted Jul 23, 1996·2 cites·19 claims
- 3138US5071984ADc-52 derivativesKYOWA HAKKO KOGYO KK·Filed 1990·Granted Dec 10, 1991·2 cites·1 claims
- 3237US5220026APyrazoloacridone derivativesKYOWA HAKKO KOGYO KK·Filed 1991·Granted Jun 15, 1993·1 cites·5 claims
- 3335US4296040AAntibiotic nanaomycin E and a process for producing the sameKYOWA HAKKO KOGYO KK·Filed 1979·Granted Oct 20, 1981·1 cites·1 claims
- 3434US4353986AProcess for producing antibiotic nanaomycin EKYOWA HAKKO KOGYO KK·Filed 1981·Granted Oct 12, 1982·0 cites·4 claims
- 3533US5218126AHalogen substituted mitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1991·Granted Jun 8, 1993·0 cites·6 claims
- 3633US5180825AMitomycin derivativesKYOWA HAKKO KOGYO KK·Filed 1991·Granted Jan 19, 1993·1 cites·19 claims
- 3732US5344938AIndole 3-carboxylic acid derivativesKYOWA HAKKO KOGYO KK·Filed 1993·Granted Sep 6, 1994·1 cites·2 claims
- 3832US5021423AMitomycin derivatives and intermediates thereforKYOWA HAKKO KOGYO KK·Filed 1989·Granted Jun 4, 1991·0 cites·9 claims
- 3932US4853385A7-N,8-N-Ethylenemitomycin 8-iminesKYOWA HAKKO KOGYO KK·Filed 1988·Granted Aug 1, 1989·0 cites·5 claims
- 4031US4748251A7-n-aminomethylenemitomycin derivativeKYOWA HAKKO KOGYO KK·Filed 1986·Granted May 31, 1988·0 cites·1 claims
- 4131US4683220ANovel physiologically active substances K-26, a process for preparation thereof and a pharmaceutical composition containing the sameKYOWA HAKKO KOGYO KK·Filed 1986·Granted Jul 28, 1987·0 cites·3 claims
- 4230US4733000AOptially active 1-amino-2-(4-hydroxyphenyl)ethylphosphonic acid and derivatives thereofKYOWA HAKKO KOGYO KK·Filed 1986·Granted Mar 22, 1988·0 cites·4 claims
- 4328US5756823AGlutathione monoester sulfonateKYOWA HAKKO KOGYO KK·Filed 1997·Granted May 26, 1998·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →