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For the Inventor, By the Inventor

Ashiya, Japan

Shoji Iwaoka

This inventor holds 5 USPTO granted patents. Top assignees: Kawasaki Steel Corporation, Tokyo Yogyo Kabushiki Kaisha. Active years: 1979-1981.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shoji Iwaoka. Retrieved from https://idiyas.com/inventor/shoji-iwaoka

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 3

Forward Citations = 18(Granted Patents)


Company Filing History:

goldMedal5 out of 1,256 
 
Kawasaki Steel Corporation
 patents
silverMedal1 out of 35 
 
Tokyo Yogyo Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 1979-1981

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5 patents (USPTO):Explore Patents
1. 4266970 - Method for blowing gas from below into molten steel in refining vessel (1981-05-12),
2. 4170467 - Method for producing high chromium steels having extremely low carbon (1979-10-09),
3. 4168158 - Method for producing alloy steels having a high chromium content and an (1979-09-18),
4. 4154603 - Method of producing alloy steels having an extremely low carbon content (1979-05-15),
5. 4154602 - Method of denitriding a high chromium molten steel with a minimum (1979-05-15),

Title: Innovations of Shoji Iwaoka in Steel Refining

Introduction

Shoji Iwaoka is a notable inventor based in Ashiya, Japan, recognized for his contributions to the field of steel refining. He holds a total of 5 patents, showcasing his innovative approaches to improving steel production processes.

Latest Patents

Iwaoka's latest patents include a method for blowing gas from below into molten steel in a refining vessel. This method involves using a refining vessel with a gas blowing aperture in the bottom wall and a frustoconical plug that prevents molten steel from penetrating into the bore during the receiving process. After receiving molten steel, gas is blown from below to remove the packing and ensure effective gas blowing into the molten steel. Another significant patent is for producing high chromium steels with extremely low carbon content. This process entails blowing inert gas into high chromium steel under reduced pressure while concurrently blowing oxygen gas to form a specific slag composition, ultimately achieving a low carbon concentration in the molten steel.

Career Highlights

Throughout his career, Iwaoka has worked with prominent companies such as Kawasaki Steel Corporation and Tokyo Yogyo Kabushiki Kaisha. His experience in these organizations has significantly contributed to his expertise in steel refining technologies.

Collaborations

Iwaoka has collaborated with notable coworkers, including Hiroyuki Kaito and Takashi Ohtani, further enhancing his innovative work in the field.

Conclusion

Shoji Iwaoka's contributions to steel refining through his innovative patents and career experiences have made a significant impact on the industry. His methods for improving steel production processes demonstrate the importance of innovation in advancing manufacturing technologies.

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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