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For the Inventor, By the Inventor

Yokohama, Japan

Nobuyuki Kajimoto

This inventor holds 19 USPTO granted patents. Top assignee: Mitsui Toatsu Chemicals, Incorporated. Active years: 1987-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuyuki Kajimoto. Retrieved from https://idiyas.com/inventor/nobuyuki-kajimoto

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

USPTO Granted Patents = 19

% Patents Active = 100.0

Average Co-Inventor Count = 4.4

ph-index = 12

Forward Citations = 390(Granted Patents)


Location History:

  • Omuta, JP (1987 - 1988)
  • Fukuoka, JP (1987 - 1990)
  • Ohmuta, JP (1988 - 1990)
  • Kanagawa, JP (1990)
  • Yokohama, JP (1988 - 1992)
  • Kanagawa-ken, JP (1997 - 1998)

Company Filing History:

goldMedal19 out of 1,379 
 
Mitsui Toatsu Chemicals, Incorporated
 patents

Years Active: 1987-1998

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19 patents (USPTO):Explore Patents
1. 5753730 - Plastic lenses having a high-refractive index, process for the (1998-05-19),
2. 5594088 - Plastic lenses having a high-refractive index, process for the (1997-01-14),
3. 5126388 - Highly-refractive plastic lens and process for making the lens (1992-06-30),
4. 5021503 - Resin for plastic lens having high-refractive index, lens comprising the (1991-06-04),
5. 5013496 - Process for molding a highly-refractive plastic lens (1991-05-07),
6. 4952731 - Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines (1990-08-28),
7. 4946923 - S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and (1990-08-07),
8. 4929707 - Polyurethane base lens resin, plastic lens comprising the resin and (1990-05-29),
9. 4918186 - Process for producing cyclic ureas (1990-04-17),
10. 4900820 - Process for producing cyclic ureas (1990-02-13),
11. 4871875 - Process for producing diphenylamines or N,N'-diphenylphenylenediamines (1989-10-03),
12. 4804783 - Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines (1989-02-14),
13. 4791185 - High-refractivity plastic lens resin formed from a polyisocyanate and a (1988-12-13),
14. 4780522 - Sulfur-containing polyurethane base lens resin (1988-10-25),
15. 4775733 - High-refractivity plastic lens resin formed by reacting at least one (1988-10-04),

Title: Nobuyuki Kajimoto – Innovator in Optical Technology

Introduction

Nobuyuki Kajimoto is a prominent inventor based in Yokohama, Japan, known for his significant contributions to the field of optical technologies. With an impressive portfolio of 19 patents, Kajimoto has focused on innovations that enhance the performance and functionality of plastic lenses.

Latest Patents

Kajimoto's recent patents focus on the development of high-refractive index plastic lenses. One aspect of his invention describes a process for preparing these lenses, which involves forming a mixture of polyisocyanate compounds and various active hydrogen compounds, including polyols and polythiol compounds. This mixture is then cast and polymerized to create high-quality lenses. Additionally, his work includes a detailed process for preparing sulfur-containing urethane resin lenses. This process combines polyisocyanate with polythiol and surface-active agents, leading to polymerized lenses cast in molds made of glass or metal. These innovations have the potential to revolutionize optical applications.

Career Highlights

Nobuyuki Kajimoto is associated with Mitsui Toatsu Chemicals, Incorporated, where he has been pivotal in driving research and development in optical materials. His expertise in chemical processes and material science has positioned him as a key player in the industry, where his work continues to influence lens manufacturing techniques.

Collaborations

Throughout his career, Kajimoto has collaborated with notable individuals, including Teruyuki Nagata and Yoshinobu Kanemura, contributing to a collaborative environment that fosters innovation and refinement of new technologies. These partnerships have played an essential role in advancing their collective research initiatives.

Conclusion

Nobuyuki Kajimoto's innovative approach to the development of high-refractive index plastic lenses signifies a substantial advancement in optical technology. His ongoing contributions through active patenting and collaboration with esteemed colleagues ensure that he remains at the forefront of advancements in this crucial area of science.

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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