Company Filing History:

9 out of 677

Eisai Company, Limited

patents

8 out of 21

Eisai Chemical Co., Ltd.

where one patent can have more than one assignee

Years Active: 1993-1997

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12 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5700938 - Intermediates for imidazopyridine derivatives (1997-12-23),

2. 5665888 - Protected aminothiazolylacetic acid derivatives (1997-09-09),

3. 5650518 - Protected aminothiazolylacetic acid derivatives (1997-07-22),

4. 5631378 - Protected aminothiazolylacetic acid derivatives (1997-05-20),

5. 5618969 - Intermediates for imidazopyridines (1997-04-08),

6. 5608068 - Process for the preparation of imidazopyridine derivatives and (1997-03-04),

7. 5587504 - Sulfonyloxy-biphenylcarboxylic ester derivatives which are intermediates (1996-12-24),

8. 5583229 - Process for the preparation of imidazopyridine derivatives (1996-12-10),

9. 5559236 - Intermediates for substituted biphenylmethylmidazopyridine angiotensin (1996-09-24),

10. 5557002 - Process for the preparation of biphenyl containing intermediates useful (1996-09-17),

11. 5554757 - Process for the preparation of imidazopyridine derivatives, and (1996-09-10),

12. 5245060 - Terpene derivatives and process for preparing the same (1993-09-14),

Title: Yoshio Urawa: A Pioneer in Pharmaceutical Innovations

Introduction

Yoshio Urawa, an esteemed inventor based in Ibaraki, Japan, has made significant contributions to the field of pharmaceuticals with a total of 12 patents to his name. His work primarily focuses on novel compounds that hold promise for the treatment of hypertension and other medical conditions.

Latest Patents

Among his latest patents, Urawa has developed intermediates for imidazopyridine derivatives, which are crucial in creating antagonists against angiotensin II receptors, a target for antihypertensive drugs. This innovative process allows the preparation of a 2-alkyl-3-(biphenyl-4-yl)methyl-3H-imidazo[4,5-b]pyridine derivative, utilizing a high-yield method involving amidation, N-alkylation, and reductive cyclization. The halogen atom in this process plays a vital role as a protective group and is eliminated effectively, enhancing industrial viability.

Another noteworthy patent details the creation of protected aminothiazolylacetic acid derivatives. This work outlines various structural possibilities where the derivatives serve as useful intermediates for incorporating special functional groups into a cephem skeleton, showcasing Urawa's versatility in pharmacological chemistry.

Career Highlights

Urawa's career includes pivotal roles at leading companies such as Eisai Company, Limited and Eisai Chemical Co., Ltd. His insights and innovative techniques have been instrumental in pushing the boundaries of pharmaceutical research and development.

Collaborations

Throughout his career, Urawa has collaborated with notable colleagues, including Ken Furukawa and Toshikazu Shimizu. These partnerships have fostered an environment of innovation, allowing for the successful exploration and expansion of pharmaceutical advancements.

Conclusion

Yoshio Urawa's contributions to the pharmaceutical industry demonstrate his commitment to enhancing healthcare through innovation. His patents reflect a blend of scientific rigor and practical application, solidifying his legacy as a forward-thinking inventor in the realm of medicine.

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2 patents pending (EPO):

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Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.