Yukio Tatsumi

This inventor holds 17 USPTO granted patents, plus 2 CIPO patents and 6 EPO patents. Top assignees: Asahi Denka Kogyo K.k., Adeka Corporation, Asahi Denka Kogyo Kabushiki Kaisha. Active years: 1996-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yukio Tatsumi. Retrieved from https://idiyas.com/inventor/yukio-tatsumi

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 17

% Patents Active = 88.2

CIPO Patents = 2

EPO Patents = 6 (Patent Applications = 3)

Average Co-Inventor Count = 3.9

ph-index = 8

Forward Citations = 165(Granted Patents)

Company Filing History:

11 out of 92

Asahi Denka Kogyo K.k.

Asahi Denka Kogyo Kabushiki Kaisha

where one patent can have more than one assignee

Years Active: 1996-2016

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9255237 - Lubricating oil additive composition and method for improving storage stability of lubricating oil additive composition (2016-02-09),

2. 8722597 - Lubricating oil composition for internal combustion engine (2014-05-13),

3. 8071801 - Phosphorus molybdenum compound and method for producing same (2011-12-06),

4. 8012916 - Phosphorus-molybdenum compound, method for producing same and lubricant additive and lubricant composition containing the compound (2011-09-06),

5. 6465399 - Lubricant composition (2002-10-15),

6. 6379581 - Lubricated refrigerant composition containing fluorocarbon-type refrigerant, synthetic oil and molybdenumoxysulfide derivatives (2002-04-30),

7. 6245725 - Lubricating compositions (2001-06-12),

8. 6217791 - Refrigerant incorporating a polyoxyalkylene glycol monomethylether (2001-04-17),

9. 6041082 - Digital amplitude modulation amplifier and television broadcasting (2000-03-21),

10. 5858931 - Lubricating composition (1999-01-12),

11. 5696065 - Engine oil composition (1997-12-09),

12. 5631213 - Process for producing molybdenum oxysulfide dithiocarbamate (1997-05-20),

13. 5627146 - Lubricating oil composition (1997-05-06),

14. 5620950 - Lubricated refrigerant composition containing alicyclic epoxy compounds (1997-04-15),

15. 5612297 - Powdery molybdenum oxysulfide dithiocarbamate composition, a process for (1997-03-18),

Title: Yukio Tatsumi: Innovator in Lubricating Oil Additives

Introduction

Yukio Tatsumi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of lubricating oil additives, holding a total of 17 patents. His work focuses on improving the performance and stability of lubricating oil compositions, which are essential for various industrial applications.

Latest Patents

Tatsumi's latest patents include a lubricating oil additive composition and a method for improving the storage stability of lubricating oil additive compositions. The purpose of this invention is to provide a thiodicarboxylic acid ester that maintains high long-term storage stability without compromising its antioxidant and wear-resistant properties. The lubricating oil additive composition is characterized by containing specific compounds and having an acid value of 0.01-0.4 mgKOH/g. Another notable patent is a lubricating oil composition for internal combustion engines, which includes essential components such as a base oil, a specific compound, and a metal-containing antioxidant. This composition is designed to have a phosphorus content ranging from 50 ppm to 1,000 ppm by mass.

Career Highlights

Throughout his career, Yukio Tatsumi has worked with notable companies such as Asahi Denka Kogyo K.K. and Adeka Corporation. His expertise in the field has allowed him to develop innovative solutions that enhance the performance of lubricating oils.

Collaborations

Tatsumi has collaborated with esteemed colleagues, including Noriyoshi Tanaka and Aritoshi Fukushima. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.

Conclusion

Yukio Tatsumi is a distinguished inventor whose work in lubricating oil additives has led to significant advancements in the industry. His innovative patents and collaborations reflect his commitment to enhancing the performance and stability of lubricating oil compositions.

Profile summary based on public USPTO records.