Inventor

Masao Koyama

Inventor

Yokohama, JP

Overview

17→

Patents

1976–2002

Patent span

Chemistry

Primary field (CPC C)

Patents· 17 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Dprimary

C07DHeterocyclic compounds41%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations21%

C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture10%

A01NPreservation of bodies of humans or animals or plants or parts thereof8%

C07CAcyclic or carbocyclic compounds8%

A61KPreparations for medical, dental or toiletry purposes5%

C07KPeptides3%

C12NMicroorganisms or enzymes3%

C12RIndexing scheme associated with subclasses c12c - c12q, relating to microorganisms3%

PatentTitleYear

6,498,251'Tetrahydrobenzindole derivatives'2002 6,407,112'Optically active tetrahydrobenzindole derivative'2002 6,355,642'Tetrahydrobenzindole compounds'2002 5,747,448'Derivatives of cyclodepsipeptide PF 1022'1998 5,312,833'Method of inhibiting tumor growth using xanthocillin X dimethylether'1994 5,210,097'Xanthocillin X monomethyl ether derivative and antitumor agent containing the same'1993 5,164,507'Antibiotic pyridine compound'1992 5,053,431'Derivatives of chrysophanol as topoisomerase II inhibitors'1991 5,037,993'Sulfonyl derivatives of an antibiotic substance isolated from streptomyces'1991 4,994,578'Certain anti-tumor duocarmycin antibiotics from streptomyces'1991 4,966,918'Derivatives of chryosphanol'1990 4,839,378'Fluorophthalimides and agricultural and horticultural fungicides containing them'1989 4,647,572'Iodoallyl and iodopropargyl substituted tetrazoles and anti-microbial compositions thereof'1987 4,563,472'Iodoallyl and iodopropargyl substituted tetrazoles and anti-microbial compositions thereof'1986 4,495,358'Antibiotic pyrrolomycin E'1985 4,128,714'Process for the preparation of 7-acylamida-3-halo-3-alkyl-cepham-4-carboxylic acids and esters'1978 3,963,712'3-Halo-cephalosporins'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2002Patents assigned to MEIJI SEIKA KAISHA (14)· patent assignee history

1976–1978Based in Tokyo, JP· patent location history

1985–1998Based in Yokohama, JP· patent location history

1989Patents assigned to MEIJI SEIKA CO (1)· patent assignee history

1990–1991Patents assigned to SLOAN KETTERING INST CANCER (2)· patent assignee history

1991–2002Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MEIJI SEIKA KAISHA	14	1976–2002
SLOAN KETTERING INST CANCER	2	1990–1991
MEIJI SEIKA CO	1	1989

Locations

Location	Patents	Span
Yokohama, JP	8	1985–1998
Kanagawa, JP	7	1991–2002
Tokyo, JP	2	1976–1978