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For the Inventor, By the Inventor

Akashi, Japan

Masao Kawamura

This inventor holds 17 USPTO granted patents, primarily in Organic Chemistry. Top assignee: Seitetsu Kagaku Co., Ltd.. Active years: 1976-1992.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Kawamura. Retrieved from https://idiyas.com/inventor/masao-kawamura-hbqhtfss

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

Calculating rank
USPTO Granted Patents = 17

% Patents Active = 100.0

Average Co-Inventor Count = 4.7

ph-index = 4

Forward Citations = 49(Granted Patents)


Location History:

  • Akashi, JA (1976 - 1977)
  • Akashi, JP (1978 - 1990)
  • Hyogo, JP (1988 - 1992)

Company Filing History:

goldMedal17 out of 50 
 
Seitetsu Kagaku Co., Ltd.
 patents

Years Active: 1976-1992

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Areas of Expertise:
Thiophene Derivatives
High Purity Sulfides
Polythiobisphenols
Alkali Metal Benzenesulfinates
N,N-Dialkylaniline
Uridine Diphosphate
P-Hydroxybenzaldehyde
Thioanisole
2-Chloropyridine
Recording Materials
Complex Compounds
Synthesis Processes
17 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. 4740578 - Process for producing polythiobisphenols and process for producing (1988-04-26),
10. 4722917 - Anti-I sorbent (1988-02-02),
11. 4604349 - Process for preparing uridine diphosphate-N-acetylgalactosamine (1986-08-05),
12. 4569909 - Process for preparing uridine diphosphate-N-acetylgalactosamine (1986-02-11),
13. 4273941 - Process for producing p-hydroxybenzaldehyde (1981-06-16),
14. 4195041 - Process for producing p-hydroxybenzaldehyde (1980-03-25),
15. 4124646 - Process for producing thioanisole (1978-11-07),

Title: The Innovative Mind of Masao Kawamura

Introduction

Masao Kawamura is an accomplished inventor based in Akashi, Japan, renowned for his significant contributions to the field of chemistry. With a portfolio of 17 patents, Kawamura has dedicated his career to developing innovative processes and materials that have profound implications in various industries.

Latest Patents

Kawamura's latest patents focus on the production of high purity bis(4-hydroxyphenyl)sulfides. His inventive process involves reacting phenols with sulfur dichloride in nonpolar organic solvents, which leads to the creation of these valuable compounds. This process not only enhances the purity of the bis(4-hydroxyphenyl)sulfides produced but also incorporates the gradual use of polar organic solvents at elevated temperatures to facilitate crystallization. Moreover, Kawamura has introduced a high-performance heat-sensitive recording material that utilizes high purity bis(4-hydroxy-3-methylphenyl)sulfide as a developer alongside a fluoran compound as a color former, achieving a specific melting point range that optimizes its utility.

Career Highlights

Throughout his career, Masao Kawamura has demonstrated a commitment to innovation at Seitetsu Kagaku Co., Ltd. His work has significantly advanced the production methods of chemical compounds that are integral in various applications, notably in recording materials where quality and performance are paramount.

Collaborations

Kawamura's journey in the innovation landscape has also been marked by fruitful collaborations with notable colleagues such as Kunioki Kato and Tadaaki Nishi. These partnerships have further fueled advancements in their shared projects and enriched the research environment within their organization.

Conclusion

Masao Kawamura stands out as a prominent figure in the world of inventions, showcasing how dedication to research and development can lead to transformative innovations. His patents and collaborative efforts exemplify the impact that one inventor can have within industrial applications and the broader field of chemistry.

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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