Masao Okubo

This inventor holds 6 USPTO granted patents. Top assignees: Sumitomo Chemical Company, Limited, Nippon Stainless Steel Co., Ltd.. Active years: 1978-1987.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Okubo. Retrieved from https://idiyas.com/inventor/masao-okubo-wf79dutq

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

Calculating rank

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 4.4

ph-index = 3

Forward Citations = 45(Granted Patents)

Company Filing History:

6 out of 6,965

Sumitomo Chemical Company, Limited

patents

4 out of 15

Nippon Stainless Steel Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1978-1987

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4659397 - Manufacturing process for plate or forging of ferrite-austenite (1987-04-21),

2. 4585479 - Welding material of ferrite-austenite two-phase stainless steel and (1986-04-29),

3. 4381941 - Method for improving surface defect of specific steel resistant to (1983-05-03),

4. 4279648 - High silicon chromium nickel steel for strong nitric acid (1981-07-21),

5. 4171218 - Anticorrosive bellows (1979-10-16),

6. 4115148 - Method for preventing corrosion of a sulfur dioxide regenerating (1978-09-19),

Title: Masao Okubo: Innovator in Ferrite-Austenite Stainless Steel

Introduction

Masao Okubo is a notable inventor from Niihama, Japan, recognized for his contributions to the field of stainless steel manufacturing. He holds a total of 6 patents, showcasing his innovative approach to materials science and engineering.

Latest Patents

Okubo's latest patents include a manufacturing process for plate or forging of ferrite-austenite two-phase stainless steel. This invention focuses on creating a product with specific chemical compositions, including C at 0.03% or below, Si at 2.0% or below, and Cr at 25 to 35%. Another significant patent involves a welding material of ferrite-austenite two-phase stainless steel, designed to produce weld metal with high corrosion resistance, particularly in nitric acid environments.

Career Highlights

Throughout his career, Okubo has worked with prominent companies such as Sumitomo Chemical Company, Limited and Nippon Stainless Steel Co., Ltd. His work has significantly impacted the development of advanced materials in the industry.

Collaborations

Okubo has collaborated with esteemed colleagues, including Masayoshi Miki and Takeshi Yoshida, contributing to various projects that enhance the understanding and application of stainless steel technologies.

Conclusion

Masao Okubo's innovative work in the field of ferrite-austenite stainless steel has led to significant advancements in manufacturing processes and materials. His contributions continue to influence the industry and inspire future innovations.

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]