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Maruzen Oil Co. Ltd.

USPTO Granted Patents = 32

Forward Citations = 307

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74 inventors (with patents filed for the assignee):

Hiroshi Fujiwara (14 out of 16 patents)

Sueo Machi (4 out of 20 patents)

Asao Takahashi (4 out of 4 patents)

4. Akio Sugishita (4 out of 4 patents)

5. Hatsutaro Yamazaki (3 out of 7 patents)

6. Koichi Asano (3 out of 3 patents)

7. Hiroshi Suzuki (3 out of 3 patents)

8. Masayuki Kashiki (3 out of 3 patents)

9. Osamu Kuratani (3 out of 3 patents)

10. Tadashi Matsumoto (3 out of 3 patents)

11. Kazuya Nakamichi (3 out of 3 patents)

12. Takuma Sasaki (3 out of 5 patents)

13. Takanobu Sugo (2 out of 32 patents)

14. Kinya Tawara (2 out of 6 patents)

15. Takashi Hori (2 out of 5 patents)

32 patents: Sort by Forward Citations

1. 4518807 - Process for the production of basic alkaline earth metal phenates (1985-05-21),

2. 4517349 - Process for the production of p-vinyl phenol polymer (1985-05-14),

3. 4503271 - Process for the production of para-vinyl phenol by dehydrogenation of (1985-03-05),

4. 4455149 - Process for the production of fuel compositions (1984-06-19),

5. 4436657 - Antitumor glycoprotein substance and preparation thereof (1984-03-13),

6. 4436656 - Novel antitumor glycoprotein substance and its preparation (1984-03-13),

7. 4390468 - Preparation of antitumor agent from shellfish (1983-06-28),

8. 4368337 - Process for converting glycol dialkyl ether (1983-01-11),

9. 4345102 - Process for producing ethylene glycol mono-t-butyl ether (1982-08-17),

10. 4299997 - Process for producing ethylene glycol mono-tert-butyl ether (1981-11-10),

11. 4243581 - Stabilized polypropylene composition (1981-01-06),

12. 4221700 - Stabilized polymer composition (1980-09-09),

13. 4189603 - Process for producing high-quality terephthalic acid suitable for use in (1980-02-19),

14. 4166191 - Process for producing highly pure p-tertiary-butyl phenol (1979-08-28),

15. 4151220 - Powder coating composition (1979-04-24),

Maruzen Oil Co. Ltd. is a Japanese company involved in the oil and energy sector. With a focus on supplying and trading petroleum products, they offer a wide range of high-quality fuels and lubricants for various industries. Maruzen Oil aims to contribute to the development of society by providing reliable energy solutions and sustainable business practices.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Jan 6 2026

32 Patents

#214 in Osaka

#2,183 in Japan

#20,108 in the World

Maruzen Oil Co. Ltd.

Forward Citations = 307

74 inventors:

Hiroshi Fujiwara (14 out of 16 patents)

Sueo Machi (4 out of 20 patents)

Asao Takahashi (4 out of 4 patents)

4. Akio Sugishita (4 out of 4 patents)

5. Hatsutaro Yamazaki (3 out of 7 patents)

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