Isao Hashimoto

This inventor holds 17 USPTO granted patents, primarily in Aromatic Compounds. Top assignees: Mitsui Petrochemical Industries, Ltd., Kumiai Chemical Industry Co., Ltd.. Active years: 1978-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Isao Hashimoto. Retrieved from https://idiyas.com/inventor/isao-hashimoto-5c8mauyt

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

USPTO Granted Patents = 17

% Patents Active = 100.0

Average Co-Inventor Count = 3.6

ph-index = 5

Forward Citations = 59(Granted Patents)

Location History:

Waki, JP (1978 - 1980)
Iwakuni, JP (1980 - 1993)
Yamaguchi, JP (1990 - 1995)
Kuga, JP (1996)

Company Filing History:

17 out of 1,008

Mitsui Petrochemical Industries, Ltd.

patents

2 out of 216

Kumiai Chemical Industry Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1978-1996

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Areas of Expertise:

N,O-Dialkylhydroxylamine

Aromatic Hydroxylic Compound

Aromatic Amine Derivatives

Pyridyloxyureas

Aromatic Urea Derivatives

Guanidine Derivative

Polyalkylhydroxychromene

Resorcin

Aromatic Hydroperoxides

Liquid-Phase Oxidation

Hydrocarbon Resins

17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5510511 - Process for preparing N,O-dialkylhydroxylamine, its salts or (1996-04-23),

2. 5475157 - Process for producing aromatic hydroxylic compound (1995-12-12),

3. 5189183 - Aromatic amine derivatives (1993-02-23),

4. 5112385 - Substituted pyridyloxyureas and use thereof as herbicides (1992-05-12),

5. 5011950 - Aromatic amine derivatives (1991-04-30),

6. 4968341 - Substituted aryloxyureas, processes for production thereof and uses (1990-11-06),

7. 4966968 - Indan derivatives (1990-10-30),

8. 4838924 - Aromatic urea derivatives and their use as herbicide (1989-06-13),

9. 4808726 - Process for preparation of guanidine derivative (1989-02-28),

10. 4323505 - Polyalkylhydroxychromene and process for preparing the same (1982-04-06),

11. 4273623 - Process for recovery of resorcin (1981-06-16),

12. 4267387 - Process for preparation of aromatic hydroperoxides (1981-05-12),

13. 4239921 - Process for purification of crude resorcinol (1980-12-16),

14. 4237319 - Process for liquid-phase oxidation of m-diisopropylbenzene (1980-12-02),

15. 4229597 - Process for the preparation of resorcin (1980-10-21),

Title: Isao Hashimoto: Innovator in Chemical Processes

Introduction

Isao Hashimoto is a prominent inventor based in Iwakuni, Japan. He has made significant contributions to the field of chemistry, particularly in the development of processes related to hydroxylamines and hydroxycarbamic acid esters. With a total of 17 patents to his name, Hashimoto's work has had a lasting impact on chemical manufacturing and applications.

Latest Patents

Hashimoto's latest patents include a variety of innovative processes. One such patent is for the preparation of N,O-dialkylhydroxylamine and its salts. Another notable patent involves a process for preparing N,O-dialkylhydroxycarbamic acid ester by reacting hydroxylamine or its salt with dihydrocarbyl carbonate in the presence of a basic compound. Additionally, he has developed methods for recovering N,O-dialkylhydroxycarbamic acid ester through azeotropic distillation with water. His work also includes processes for hydrolyzing N,O-dialkylhydroxycarbamic acid ester and purifying N,O-dialkylhydroxylamine hydrochloride. Furthermore, he has patented a method for separating N,O-dialkylhydroxylamine hydrochloride using benzene or alkylated benzene.

Career Highlights

Throughout his career, Isao Hashimoto has worked with notable companies such as Mitsui Petrochemical Industries, Ltd. and Kumiai Chemical Industry Co., Ltd. His expertise in chemical processes has been instrumental in advancing the capabilities of these organizations.

Collaborations

Hashimoto has collaborated with esteemed colleagues, including Katsuya Takahashi and Hirohiko Nambu. These partnerships have fostered innovation and contributed to the success of various projects in the chemical industry.

Conclusion

Isao Hashimoto's contributions to the field of chemistry through his numerous patents and collaborations highlight his role as a key innovator. His work continues to influence the development of chemical processes and applications.

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]