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For the Inventor, By the Inventor

Iwatsuki, Japan

Yutaka Nakahara

This inventor holds 65 USPTO granted patents, primarily in Synthetic Resin Stabilizers (CPC class 260 ). Top assignees: Adeka Argus Chemical Co., Ltd., Argus Chemical Corporation, Hitachi Chemical Company, Ltd.. Active years: 1978-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yutaka Nakahara. Retrieved from https://idiyas.com/inventor/yutaka-nakahara

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

USPTO Granted Patents = 65

% Patents Active = 100.0

Average Co-Inventor Count = 3.1

ph-index = 12

Forward Citations = 485(Granted Patents)

Forward Citations (Not Self Cited) = 471(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Iwatsuiki, JP (1981)
  • Minamishimoarai, Iwatsuki, Saitama, JP (1984)
  • Minamishimoarai, Iwatsuki City, Saitama, JP (1984)
  • Iwatsuki, JP (1978 - 1989)
  • Okegawa City, Saitama, JP (1989)
  • Okegawa, JP (1986 - 1991)

Company Filing History:

goldMedal37 out of 93 
 
Adeka Argus Chemical Co., Ltd.
 patents
silverMedal22 out of 114 
 
Argus Chemical Corporation
 patents
bronzeMedal1 out of 1,641 
 
Hitachi Chemical Company, Ltd.
 patents
4. 1 out of 871 
 
Kyoto University
 patents
5. 5 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 1978-1991

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Areas of Expertise:
Synthetic Resin
Stabilizers
Weatherability
Polypropylene
Polycarbonate
Polyphenylene Sulfide
Triazines
Amines
Phosphites
Alkylidene
Piperidines
Light Stabilizers
65 patents (USPTO):Explore Patents
1. 4997888 - Weatherability and adherence of polypropylene (1991-03-05),
2. 4994529 - Weatherability and adherence of polypropylene (1991-02-19),
3. 4910238 - Poly(2,2,6,6-tetramethyl piperidyl amino)-1,3,5-triazines as stabilizers (1990-03-20),
4. 4898688 - Poly(2,2,6-tetramethyl piperidyl amino)-1,3,5-triazines as stabilizers (1990-02-06),
5. 4897438 - Stabilized synthetic resin composition (1990-01-30),
6. 4885323 - Poly-2,2,6,6-tetramethyl piperidyl amino spiro glycol (1989-12-05),
7. 4871793 - Polyphenylene sulfide resin compositions having improved resistance to (1989-10-03),
8. 4820844 - Radiation sensitizer (1989-04-11),
9. 4812498 - Polycarbonate resin compositions having improved resistance to (1989-03-14),
10. 4798836 - Bis-(2,2,6,6-tetramethyl-piperidyl) diimides as light stabilizers for (1989-01-17),
11. 4767834 - Vinyl benzyl 2,2,6,6-tetramethyl piperidines (1988-08-30),
12. 4760141 - Hydrocarbyl(polyphenol)-poly(2,2,6,6-tetramethyl (1988-07-26),
13. 4759871 - Hydrocarbyl(polyphenol)-poly(2,2,6,6-tetramethyl (1988-07-26),
14. 4743688 - Poly-2,2,6,6-tetramethyl piperidyl amino spiro glycol (1988-05-10),
15. 4740544 - Hydrocarbyl(polyphenol)-poly(2,2,6,6-tetramethyl (1988-04-26),

Title: Yutaka Nakahara: Pioneering Inventor from Iwatsuki

Introduction: Yutaka Nakahara is a renowned inventor hailing from Iwatsuki, Japan, known for his groundbreaking contributions to various technological fields.

Latest Patents: Yutaka Nakahara holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his innovative spirit and forward-thinking approach.

Career Highlights: Throughout his illustrious career, Yutaka Nakahara has worked with leading research institutions and tech companies, spearheading projects that have revolutionized the way we interact with technology on a daily basis.

Collaborations: Yutaka Nakahara has collaborated with top engineers, scientists, and designers from around the world, fostering a culture of innovation and creativity that has led to the development of cutting-edge products and solutions.

Conclusion: Yutaka Nakahara's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors and entrepreneurs, solidifying his legacy as a true pioneer in the world of technology.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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