Company Filing History:

15 out of 1,865

Kuraray Co., Ltd.

patents

1 out of 4

Nihon Iyakuhin Kogyo Co., Ltd.

patents

1 out of 18

Kyowa Gas Chemical Industry Company, Ltd.

patents

where one patent can have more than one assignee

Years Active: 1976-1991

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5077046 - Polyprenyl composition or compounds and process for the production (1991-12-31),

2. 5012018 - Polyprenyl composition of compounds and process for the production (1991-04-30),

3. 4886904 - Polyprenyl composition or compounds and process for the production (1989-12-12),

4. 4593145 - Process for producing isoprene (1986-06-03),

5. 4521417 - Geranylgeranylacetamide compounds having a piperazine ring, salts (1985-06-04),

6. 4511751 - Process for producing isoprene (1985-04-16),

7. 4303588 - Farnesylacetic acid amides (1981-12-01),

8. 4289786 - Farnesylacetic acid ester derivatives (1981-09-15),

9. 4252726 - Preparation of dl-.alpha.-tocopherol (1981-02-24),

10. 4026960 - 2,7,10,15,18,23-Hexamethyltetra-cosane (1977-05-31),

11. 4011277 - Preparation of squalane by hydrogenolysis (1977-03-08),

12. 4006193 - Isomerization of the unsaturated alcohols (1977-02-01),

13. 3984475 - Process for the production of substituted ketones (1976-10-05),

14. 3983175 - Process for the production of a substituted ketone (1976-09-28),

15. 3981930 - Diacetylene diol derivatives and process for preparing the same (1976-09-21),

Title: Yoichi Ninagawa: Innovator in Polyprenyl Compounds

Introduction

Yoichi Ninagawa is a prominent inventor based in Hasaki, Japan. He has made significant contributions to the field of polyprenyl compounds, holding a total of 15 patents. His work focuses on the synthesis and application of these compounds, which have important implications in biochemistry.

Latest Patents

Ninagawa's latest patents include a polyprenyl composition that consists of a mixture of polyprenyl compounds. These compounds are represented by a specific formula, where A1 denotes a hydroxyl or acetyloxy group, and the mixture contains substantial amounts of at least three compounds with n values of 14, 15, and 16. This composition is particularly useful for synthesizing mammalian dolichols. The production process involves extracting leaves from Ginkgo biloba or Cedrus deodara using an oil-soluble organic solvent, followed by hydrolysis and various separation techniques.

Career Highlights

Throughout his career, Yoichi Ninagawa has worked with notable companies such as Kuraray Co., Ltd. and Nihon Iyakuhin Kogyo Co., Ltd. His expertise in polyprenyl compounds has positioned him as a key figure in the industry.

Collaborations

Ninagawa has collaborated with esteemed colleagues, including Takashi Nishida and Yoshiaki Omura. These partnerships have furthered his research and development in the field of polyprenyl compounds.

Conclusion

Yoichi Ninagawa's innovative work in polyprenyl compounds has led to significant advancements in biochemistry. His contributions continue to influence the synthesis and application of these important compounds.

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