Inventor

HIRAKAWA TATSUO

JP4 patents

⚠️ This page may combine multiple inventors who share the name “HIRAKAWA TATSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TOYAMA CHEMICAL CO LTD

2 patents

US4489072ADec 18, 1984

Cephalosporins

TOYAMA CHEMICAL CO LTD18 citations81

US5144027ASep 1, 1992

Cephalosporins, process for producing the same, intermediates thereof and process for producing the intermediates

TOYAMA CHEMICAL CO LTD8 citations73

HANDI PAC INC

1 patent

US4673738AJun 16, 1987

Novel intermediates of cephalosporins and process for producing 7-(substituted or unsubstituted amino)-3-substituted methyl-Δ3 -cephem-4-carboxylic acids

HANDI PAC INC2 citations62

TOYOMA CHEMICAL COMPANY LTD

1 patent

US4879381ANov 7, 1989

7-(substituted or unsubstituted amino) 3-substituted methyl-3 cephem-4-carboxylic acid

TOYOMA CHEMICAL COMPANY LTD4 citations57