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For the Inventor, By the Inventor

Hyogo, Japan

Kunioki Kato

This inventor holds 11 USPTO granted patents. Top assignees: Seitetsu Kagaku Co., Ltd., Sumitomo Metal Industries, Inc.. Active years: 1979-1992.

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 5.1

ph-index = 3

Forward Citations = 29(Granted Patents)


Location History:

  • Akashi, JP (1979 - 1990)
  • Hyogo, JP (1988 - 1992)

Company Filing History:

goldMedal11 out of 50 
 
Seitetsu Kagaku Co., Ltd.
 patents
silverMedal1 out of 929 
 
Sumitomo Metal Industries, Inc.
 patents
where one patent can have more than one assignee

Years Active: 1979-1992

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11 patents (USPTO):Explore Patents
1. 5175372 - Process of producing high purity bis(4-hydroxyphenyl)sulfides and (1992-12-29),
2. 5102858 - Heat-sensitive recording materials containing high purity (1992-04-07),
3. 5101049 - Novel thiophene derivatives and methods for producing the same (1992-03-31),
4. 4943655 - Salt of 5-acetyl-2-alkylbenzenesulfonic acid (1990-07-24),
5. 4853158 - Process for preparing N,N-dialkylaniline salt of 5-acetyl-2-alkylbenzene (1989-08-01),
6. 4849138 - Method of producing alkali metal benzenesulfinates (1989-07-18),
7. 4835317 - 4-tert.-butyl-1,2-benzenedithiol, complex compounds derived therefrom, (1989-05-30),
8. 4792612 - Thiophene derivatives and methods for producing the same (1988-12-20),
9. 4273941 - Process for producing p-hydroxybenzaldehyde (1981-06-16),
10. 4195041 - Process for producing p-hydroxybenzaldehyde (1980-03-25),
11. 4172912 - Process for adhering polyethylene to steel substrates (1979-10-30),

Title: **Kunioki Kato: A Pioneer in High Purity Chemical Production**

Introduction

Kunioki Kato, based in Hyogo, Japan, is an accomplished inventor with a remarkable portfolio of 11 patents. His innovative work primarily focuses on the production of high purity bis(4-hydroxyphenyl)sulfides, which have significant applications in various chemical processes.

Latest Patents

Kato's latest patents describe a refined process for producing high purity bis(4-hydroxyphenyl)sulfides. The method involves reacting phenols with sulfur dichloride in nonpolar organic solvents, followed by the removal of these solvents and the addition of polar organic solvents to dissolve the mixture at elevated temperatures. This process enables the crystallization of high purity bis(4-hydroxyphenyl)sulfides, which are essential in heat-sensitive recording materials. The resulting material features a melting point between 123.9°C and 124.9°C and is effectively utilized as a developer alongside a fluoran compound as a color former.

Career Highlights

Throughout his career, Kunioki Kato has made significant contributions to the field of chemistry and chemical engineering. He has worked with prominent companies such as Seitetsu Kagaku Co., Ltd. and Sumitomo Metal Industries, Inc., where he developed his expertise and innovated new methods in chemical processing.

Collaborations

Kato's journey in innovation has been enriched by collaborations with talented colleagues. Notably, he has partnered with Masao Kawamura and Hiroshi Goda, whose insights and expertise have further propelled his research endeavors and contributions to the field.

Conclusion

Kunioki Kato's inventive spirit and dedication to producing high purity substances underscore his status as a leading figure in chemical innovation. His patented processes not only advance scientific understanding but also enhance practical applications, marking his significant impact in the industry.

Profile summary based on public USPTO records.
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