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For the Inventor, By the Inventor

Chiba, Japan

Masahiro Yamashita

USPTO Granted Patents = 12

 

Average Co-Inventor Count = 5.5

ph-index = 5

Forward Citations = 139(Granted Patents)


Location History:

  • Hiroshima, JP (2002)
  • Yamaguchi, JP (2005 - 2008)
  • Sodegaura, JP (2006 - 2009)
  • Chiba, JP (2012 - 2024)

Company Filing History:

goldMedal12 out of 1,786 
 
Mitsui Chemicals, Inc.
 patents

Years Active: 2002-2024

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12 patents (USPTO):Explore Patents
1. 11873462 - Lubricating oil composition (2024-01-16),
2. 11162050 - Lubricating oil composition, viscosity modifier for lubricating oil, and additive composition for lubricating oil (2021-11-02),
3. 9944728 - Production method of olefin (co)polymer containing constituent unit derived from 1-butene (2018-04-17),
4. 9540459 - Production method of olefin polymer and olefin polymerization catalyst (2017-01-10),
5. 9315602 - Method for producing olefin polymer (2016-04-19),
6. 8716418 - Process for producing syndiotactic α-olefin polymer (2014-05-06),
7. 8293856 - Process for preparing olefin polymer using mixed catalyst (2012-10-23),
8. 7619030 - Automobile part of polypropylene resin composition (2009-11-17),
9. 7449533 - Metallocene compound, process for preparing metallocene compound, olefin polymerization catalyst, process for preparing polyolefin, and polyolefin (2008-11-11),
10. 7081493 - Automotive part made of polypropylene resin composition (2006-07-25),
11. 6939928 - Metallocene compound, process for producing metallocene compound, olefin polymerization catalyst, process for producing polyolefin, and polyolefin (2005-09-06),
12. 6342568 - Metallocene compound, and process for preparing polyolefin by using it (2002-01-29),

Title: Masahiro Yamashita: Innovator in Lubricating Oil Composition

Introduction

Masahiro Yamashita is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of lubricating oil compositions, holding a total of 12 patents. His work focuses on enhancing the performance and characteristics of lubricating oils, particularly in low-temperature conditions.

Latest Patents

Yamashita's latest patents include a lubricating oil composition that features a resin (A) and a base oil (B). The resin (A) is specified to be in a range of 0.01 to 50 parts by mass per 100 parts of (A) and (B). The resin (A) must meet several requirements, including being a polymer that contains a constituent unit from 4-methyl-1-pentene and an α-olefin with 2 to 20 carbon atoms. Additionally, the intrinsic viscosity and melting point of the resin are carefully defined to ensure optimal performance. Another notable patent focuses on a viscosity modifier for lubricating oil, aimed at providing excellent viscosity characteristics at low temperatures.

Career Highlights

Masahiro Yamashita is currently employed at Mitsui Chemicals, Inc., where he continues to innovate in the field of lubricants. His expertise in polymer chemistry and oil composition has positioned him as a key figure in the development of advanced lubricating solutions.

Collaborations

Yamashita collaborates with talented coworkers, including Hiromu Kaneyoshi and Takashi Yukita. Their combined efforts contribute to the ongoing research and development of innovative lubricating oil products.

Conclusion

Masahiro Yamashita's work in lubricating oil compositions showcases his dedication to innovation and excellence in the field. His patents reflect a deep understanding of polymer chemistry and its applications in enhancing lubricating oil performance.

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