This inventor holds 4 USPTO granted patents. Top assignees: Nippon Steel Corporation, Japan Atomic Energy Institute. Active years: 1996-2003.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
4 out of 3,713 
1 out of 322 
Years Active: 1996-2003
Title: Shigeru Ohkita: Innovator in Steel Pipe Technology
Introduction
Shigeru Ohkita is a prominent inventor based in Futtsu, Japan. He has made significant contributions to the field of steel pipe technology, holding a total of 4 patents. His work focuses on enhancing the strength and durability of line pipes, particularly in low-temperature environments.
Latest Patents
One of Ohkita's latest patents is for a super-high-strength line pipe that excels in low-temperature toughness and is designed for easy field welding. This innovation boasts a tensile strength of at least 900 MPa, surpassing the API standard. The production method involves shaping a steel plate into a pipe and arc welding the seams, ensuring that the base steel strength ranges from 900 to 1,100 MPa. Additionally, the weld metal's strength is designed to be higher than the base steel strength by at least 100 MPa. Another notable patent involves steel for welded structures and welding wire, which aims to reduce residual stress after welding without requiring post-treatment. This steel begins transforming from austenite to martensite at temperatures between 200°C and 350°C, with a yield strength of 60 kg/mm to 120 kg/mm at the transformation starting temperature.
Career Highlights
Throughout his career, Shigeru Ohkita has worked with notable companies such as Nippon Steel Corporation and Nippin Steel Corporation. His expertise in steel technology has positioned him as a key figure in the industry, contributing to advancements that enhance the performance of welded structures.
Collaborations
Ohkita has collaborated with esteemed colleagues, including Hitoshi Asahi and Hiroshi Tamehiro. Their combined efforts have led to significant innovations in the field of steel pipe technology.
Conclusion
Shigeru Ohkita's contributions to steel pipe technology demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of material science and engineering, paving the way for advancements in the industry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile