Inventor
KUMAGAI HITOSHI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAI HITOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
COSMO SOGO KENKYUSHO KK
3 patentsUS5998631ADec 7, 1999
Cyclic phenol sulfide having at least one sulfinyl or sulfonyl group and process for producing the same
COSMO SOGO KENKYUSHO KK14 citations71
US5824808AOct 20, 1998
Cyclic phenol sulfide and process for producing the same
COSMO SOGO KENKYUSHO KK16 citations71
US5881358AMar 9, 1999
Composition for extracting transition metal and method for extracting transition metal using the same
COSMO SOGO KENKYUSHO KK14 citations65
KUMAGAI AKIRA
2 patentsTOYOTA CHUO KENKYUSHO KK
2 patentsCOSMO OIL CO LTD
2 patentsUS5178781AJan 12, 1993
Process for producing over-based sulfurized alkaline earth metal phenate type detergent
COSMO OIL CO LTD5 citations62
US4902436AFeb 20, 1990
Process for producing a mixture of sulfides of alkaline earth metal salts of alkylhydroxybenzoic acid and alkylphenol
COSMO OIL CO LTD3 citations62