This inventor holds 5 USPTO granted patents. Top assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Nippon Steel Sumitomo Metal Corporation, Ukima Colour & Chemicals Mfg. Co., Ltd.. Active years: 1998-2018.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Tokyo, JP (1998 - 2018)
- Osaka, JP (2018)
Company Filing History:
3 out of 265 
2 out of 1,102 
1 out of 28 Years Active: 1998-2018
Title: The Innovations of Keiji Nakajima
Introduction
Keiji Nakajima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced copper alloys. With a total of five patents to his name, Nakajima's work has garnered attention for its innovative approaches and practical applications.
Latest Patents
One of Nakajima's latest patents is focused on a copper alloy and the process for producing it. This copper alloy consists of two or more elements from chromium (Cr), titanium (Ti), and zirconium (Zr), with the balance being copper (Cu) and impurities. The patent outlines a specific relationship between the total number of elements and the diameter of the alloy, which is defined by a mathematical formula. The alloy is produced by cooling a bloom, slab, billet, or ingot from casting to a temperature of 450°C or lower, at a cooling rate of 0.5°C/s or more. Following this cooling process, the alloy undergoes working at temperatures of 600°C or lower, along with a heat treatment that involves holding the material at temperatures between 150°C and 750°C for at least 30 seconds. This process may be repeated multiple times to achieve the desired properties.
Career Highlights
Throughout his career, Nakajima has worked with notable companies, including Dainichiseika Color & Chemicals Manufacturing Co., Ltd. and Nippon Steel & Sumitomo Metal Corporation. His experience in these organizations has allowed him to refine his expertise in materials development and innovation.
Collaborations
Nakajima has collaborated with esteemed colleagues such as Michiei Nakamura and Yukio Kanbara. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
Keiji Nakajima's contributions to the field of materials science, particularly through his innovative copper alloy patents, highlight his role as a significant inventor in Japan. His work continues to influence the industry and pave the way for future advancements in material technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile