Inventor
TAKENO RYUKO
JP11 patents
⚠️ This page may combine multiple inventors who share the name “TAKENO RYUKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOYAMA CHEMICAL CO LTD
8 patentsUS4436921AMar 13, 1984
1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
TOYAMA CHEMICAL CO LTD4 citations72
US4736026AApr 5, 1988
Novel process for producing a cephalosporin
TOYAMA CHEMICAL CO LTD4 citations61
US4563534AJan 7, 1986
Process for producing 2-(2-aminothiazol-4-yl)glyoxylic acid derivative or a salt thereof, and intermediates therefor and process for producing the intermediates
TOYAMA CHEMICAL CO LTD2 citations61
US4477666AOct 16, 1984
1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
TOYAMA CHEMICAL CO LTD2 citations61
US4477664AOct 16, 1984
Novel 1-(4-piperidiniobenzyl)-2,3-dioxopiperazine derivatives or acid addition salts thereof
TOYAMA CHEMICAL CO LTD1 citations61
US4448963AMay 15, 1984
4-[4-(Thiazolyl-amino)benzyl]-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
TOYAMA CHEMICAL CO LTD1 citations61
US4667040AMay 19, 1987
Novel process for producing 2-(2-aminothiazol-4-yl)glyoxylic acid derivative or a salt thereof, and intermediates therefor and process for producing the intermediates
TOYAMA CHEMICAL CO LTD1 citations51
US4459407AJul 10, 1984
1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives and salts thereof
TOYAMA CHEMICAL CO LTD0 citations51