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For the Inventor, By the Inventor

Chiba, Japan

Hiroshi Maki

This inventor holds 9 USPTO granted patents. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1977-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Maki. Retrieved from https://idiyas.com/inventor/hiroshi-maki-e9bc2rn9

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 3.1

ph-index = 4

Forward Citations = 86(Granted Patents)


Location History:

  • Takatsuki, JA (1977 - 1978)
  • Ichihara, JP (1981)
  • Chiba, JP (1984 - 1994)

Company Filing History:

goldMedal9 out of 6,961 
 
Sumitomo Chemical Company, Limited
 patents

Years Active: 1977-1994

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9 patents (USPTO):Explore Patents
1. 5276193 - Process for preparing N-alkyl-substituted aminophenols (1994-01-04),
2. 5202485 - Process for preparing N-alkylaminophenols (1993-04-13),
3. 4967004 - Process for producing N,N-diethylaminophenols (1990-10-30),
4. 4585896 - Process for the production of an aminophenol (1986-04-29),
5. 4486605 - Method for producing aromatic carbonyl compounds (1984-12-04),
6. 4308406 - Method for preventing the discoloration of dihydric phenols (1981-12-29),
7. 4075285 - Rubber-modified polystyrene resin composition (1978-02-21),
8. 4073831 - Thermoplastic resin composition (1978-02-14),
9. 4017436 - Thermoplastic resin composition (1977-04-12),

Title: Hiroshi Maki: Innovator in Chemical Processes

Introduction

Hiroshi Maki is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of chemical processes, holding a total of 9 patents. His work focuses on innovative methods for preparing various chemical compounds, particularly aminophenols.

Latest Patents

Maki's latest patents include a process for preparing N-alkyl-substituted aminophenols. This process involves continuously feeding an aldehyde or a ketone to a reaction system containing an organic solvent, a catalyst for reduction, hydrogen, and an aminophenol. The method allows for a high yield even when the catalyst is repeatedly used, and it does not cause corrosion of equipment. Another notable patent is for preparing N-alkylaminophenols, which involves reductive alkylation with an aldehyde or a ketone in the presence of an organic solvent and hydrogen. This process is conducted at temperatures ranging from 20°C to 70°C, utilizing a catalyst that includes platinum or palladium supported on activated carbon.

Career Highlights

Hiroshi Maki is currently employed at Sumitomo Chemical Company, Limited, where he continues to develop innovative chemical processes. His expertise in reductive alkylation has positioned him as a key figure in the advancement of chemical manufacturing techniques.

Collaborations

Maki has collaborated with notable coworkers, including Haruhisa Harada and Minoru Tabana. Their combined efforts have contributed to the success of various projects within the company.

Conclusion

Hiroshi Maki's contributions to the field of chemical processes through his innovative patents demonstrate his commitment to advancing technology in this area. His work continues to influence the industry and pave the way for future developments.

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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