Inventor · disambiguated record
Keizo Maruyama
Also filed as: MARUYAMA KEIZO
3 granted patents·87 citations·filing 1979–1983
75Inventor score
Files withNIPPON CATALYTIC CHEM IND3
Top patents by PatentIndex Score
3 records- 0189US4481304ACatalyst for producing phthalic anhydrideNIPPON CATALYTIC CHEM IND·Filed 1983·Granted Nov 6, 1984·26 cites·9 claims
- 0282US4284571AProcess for producing phthalic anhydride and catalyst thereforNIPPON CATALYTIC CHEM IND·Filed 1979·Granted Aug 18, 1981·28 cites·15 claims
- 0367US4418045AMethod for disposal of waste gas and apparatus thereforNIPPON CATALYTIC CHEM IND·Filed 1981·Granted Nov 29, 1983·33 cites·8 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →