Eisai Chemical Co., Ltd.

Organization

Ibaraki, JP

Organizations

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Patents Grantslast 30 patents

Information Patent Grant
Process for producing cephem compounds in an aqueous medium
- Patent number 5,998,611
- Issue date Dec 7, 1999
- Eisai Chemical Co., Ltd.
- Homare Shinohara
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Butenyl hydroquinone derivatives
- Patent number 5,874,611
- Issue date Feb 23, 1999
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Intermediates for imidazopyridine derivatives
- Patent number 5,700,938
- Issue date Dec 23, 1997
- Eisai Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Tetrahydro-alkenyl-methanonaphthalene-5,8-dione derivatives
- Patent number 5,686,635
- Issue date Nov 11, 1997
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of quinone derivative
- Patent number 5,677,471
- Issue date Oct 14, 1997
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Protected aminothiazolylacetic acid derivatives
- Patent number 5,665,888
- Issue date Sep 9, 1997
- Eisai Chemical Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Protected aminothiazolylacetic acid derivatives
- Patent number 5,650,518
- Issue date Jul 22, 1997
- Eisai Chemical Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Processes for the preparation of hydroquinone and benzoquinone deri...
- Patent number 5,637,716
- Issue date Jun 10, 1997
- Eisai Co., Ltd.
- Yuuki Komatsu
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Protected aminothiazolylacetic acid derivatives
- Patent number 5,631,378
- Issue date May 20, 1997
- Eisai Chemical Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Intermediates for imidazopyridines
- Patent number 5,618,969
- Issue date Apr 8, 1997
- Eisai Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of imidazopyridine derivatives and inte...
- Patent number 5,608,068
- Issue date Mar 4, 1997
- Eisai Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
1,4,4.sub.a 5,8,9.sub.a -hexahydro-1.alpha.,4.alpha.-methanoan-thra...
- Patent number 5,608,092
- Issue date Mar 4, 1997
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Sulfonyloxy-biphenylcarboxylic ester derivatives which are intermed...
- Patent number 5,587,504
- Issue date Dec 24, 1996
- Eisai Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Oxidative process for the preparation of allyl quinone derivatives
- Patent number 5,565,586
- Issue date Oct 15, 1996
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Intermediates for substituted biphenylmethylmidazopyridine angioten...
- Patent number 5,559,236
- Issue date Sep 24, 1996
- Eisai Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of biphenyl containing intermediates us...
- Patent number 5,557,002
- Issue date Sep 17, 1996
- Eisai Co., Ltd.
- Yoshio Urawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification method of crude product
- Patent number 5,547,580
- Issue date Aug 20, 1996
- Eisai Chemical Co., Ltd.
- Masahiko Tsujii
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for the preparation of a quinone derivative
- Patent number 5,476,955
- Issue date Dec 19, 1995
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of aminothiadiazolylacetyl halide deriv...
- Patent number 5,428,173
- Issue date Jun 27, 1995
- Eisai Chemical Co., Ltd.
- Takeo Kanai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation process of naphthoquinone derivative and intermediate f...
- Patent number 5,412,124
- Issue date May 2, 1995
- Eisai Chemical Co., Ltd.
- Kimio Hamamura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing benzylphthalazinone derivatives and salts the...
- Patent number 5,216,151
- Issue date Jun 1, 1993
- Eisai Chemical Co., Ltd.
- Kazukata Murakami
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing 2-methyl-1,4-naphthoquinone
- Patent number 4,906,411
- Issue date Mar 6, 1990
- Eisai Chemical Co., Ltd.
- Atsushi Shinnaka
- C07 - ORGANIC CHEMISTRY

Eisai Chemical Co., Ltd.

Organization

Patents Grantslast 30 patents

Process for producing cephem compounds in an aqueous medium

Butenyl hydroquinone derivatives

Intermediates for imidazopyridine derivatives

Tetrahydro-alkenyl-methanonaphthalene-5,8-dione derivatives

Process for the preparation of quinone derivative

Protected aminothiazolylacetic acid derivatives

Protected aminothiazolylacetic acid derivatives

Processes for the preparation of hydroquinone and benzoquinone deri...

Protected aminothiazolylacetic acid derivatives

Intermediates for imidazopyridines

Process for the preparation of imidazopyridine derivatives and inte...

1,4,4.sub.a 5,8,9.sub.a -hexahydro-1.alpha.,4.alpha.-methanoan-thra...

Sulfonyloxy-biphenylcarboxylic ester derivatives which are intermed...

Oxidative process for the preparation of allyl quinone derivatives

Intermediates for substituted biphenylmethylmidazopyridine angioten...

Process for the preparation of biphenyl containing intermediates us...

Purification method of crude product

Process for the preparation of a quinone derivative

Process for the preparation of aminothiadiazolylacetyl halide deriv...

Preparation process of naphthoquinone derivative and intermediate f...

Process for producing benzylphthalazinone derivatives and salts the...

Process for producing 2-methyl-1,4-naphthoquinone