Chitoshi Shimakawa

This inventor holds 18 USPTO granted patents, plus 2 CIPO patents and 7 EPO patents, primarily in Polymer Chemistry. Top assignees: Mitsui Chemicals, Inc., Mitsui Toatsu Chemicals, Incorporated. Active years: 1987-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Chitoshi Shimakawa. Retrieved from https://idiyas.com/inventor/chitoshi-shimakawa

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

USPTO Granted Patents = 18

% Patents Active = 100.0

CIPO Patents = 2

EPO Patents = 7 (Patent Applications = 6)

Average Co-Inventor Count = 5.2

ph-index = 5

Forward Citations = 124(Granted Patents)

Location History:

Ohmuta, JP (1987)
Fukuoka-ken, JP (1997)
Fukuoka, JP (1992 - 2002)
Omuta, JP (1991 - 2008)
Arao, JP (2012 - 2022)

Company Filing History:

14 out of 1,817

Mitsui Chemicals, Inc.

patents

4 out of 1,379

Mitsui Toatsu Chemicals, Incorporated

patents

Years Active: 1987-2022

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Areas of Expertise:

Xylylenediisocyanate

Polymerizable Composition

Sulfide Compound

Resin Material

Optical Resin

Isocyanate Production

Aldehyde Compounds

Thioepoxy

Urethane Plastic Lens

Dicyanonorbornane

Bisamide Compound

Electroreduction Process

18 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11254783 - Xylylenediisocyanate composition, xylylenediisocyanate-modified composition, two-component resin material, and resin (2022-02-22),

2. 10844010 - Process for producing (poly)sulfide compound and process for producing episulfide compound (2020-11-24),

3. 10640605 - Xylylenediisocyanate composition, xylylenediisocyanate-modified composition, two-component resin material, and resin (2020-05-05),

4. 9708260 - Method for producing meta-xylylenediamines and method for producing bisamide compound (2017-07-18),

5. 9670148 - Method for producing meta-xylylenediisocyanates (2017-06-06),

6. 9227925 - Process for producing aldehyde compounds (2016-01-05),

7. 8183407 - Process for production of isocyanate, isocyanate produced by the process, and use of the isocyanate (2012-05-22),

8. 8183404 - Process for producing dicyanonorbornane and zerovalent nickel complex catalyst (2012-05-22),

9. 7354989 - Thioepoxy based polymerizable composition and method for production thereof (2008-04-08),

10. 6458917 - Polymerizable composition (2002-10-01),

11. 6365707 - Polymerizable composition and process for producing optical resin comprising the same (2002-04-02),

12. 6300464 - Polymerizable composition (2001-10-09),

13. 6204311 - Polymerizable composition (2001-03-20),

14. 5955206 - Polysulfide-based resin composition, polysulfide-based resin, and (1999-09-21),

15. 5693738 - Composition for urethane-base plastic lens, urethane-base plastic lens (1997-12-02),

Title: Chitoshi Shimakawa: A Pioneer in Chemical Innovations

Introduction

Chitoshi Shimakawa, an accomplished inventor based in Arao, Japan, has significantly contributed to the field of chemistry with his innovative inventions. With a remarkable portfolio of 18 patents, Shimakawa is recognized for his groundbreaking work in developing advanced chemical compositions and processes.

Latest Patents

Among his latest patents, Shimakawa has introduced several notable innovations, including a xylylenediisocyanate composition and a xylylenediisocyanate-modified composition. He has also developed a two-component resin material and a unique xylylenediisocyanate composition, which incorporates a specific compound represented by Chemical Formula (1), with a concentration ranging from 0.6 ppm to 60 ppm. Furthermore, he has advanced processes for producing (poly)sulfide compounds and episulfide compounds by reacting thiol compounds with sulfur in the presence of a basic compound.

Career Highlights

Shimakawa has made significant strides in his professional journey, particularly during his time at Mitsui Chemicals, Inc. and Mitsui Toatsu Chemicals, Incorporated. His work has not only garnered patents but also played a crucial role in advancing chemical engineering practices within the industry.

Collaborations

Throughout his career, Chitoshi Shimakawa has collaborated with notable colleagues, including Seiichi Kobayashi and Hiroyuki Morijiri. These partnerships have enhanced his research capabilities and fostered a synergistic approach to developing innovative chemical solutions.

Conclusion

Chitoshi Shimakawa's contributions to the field of chemistry through his inventions and patents underscore his status as a leading inventor in Japan. With a focus on xylylenediisocyanate compositions and novel chemical processes, his work continues to impact the industry positively, paving the way for future innovations.

Profile summary based on public USPTO records.