This inventor holds 6 USPTO granted patents, plus 1 CIPO patent. Top assignees: Wako Pure Chemical Industries, Inc., Purex Co., Ltd., Tokyo Tanabe Company, Ltd.. Active years: 1986-1994.
Location History:
- Saitama, JP (1986)
- Fujimi, JP (1989 - 1992)
- Kawagoe, JP (1994)
Company Filing History:
6 out of 299 
1 out of 26 
1 out of 41 Years Active: 1986-1994
Title: Hiroyoshi Nawa: Innovator in Surface Treatment and Pharmaceutical Chemistry
Introduction
Hiroyoshi Nawa is a prominent inventor based in Fujimi, Japan. He has made significant contributions to the fields of surface treatment and pharmaceutical chemistry. With a total of 6 patents to his name, Nawa's work has had a considerable impact on various industries.
Latest Patents
One of Nawa's latest patents is a surface treating cleaning method. This method involves a combination of a first surface treating solution, which includes an inorganic or organic alkali such as ammonia or a quaternary ammonium hydroxide, hydrogen peroxide, and water. The second surface treating solution consists of ultra-pure water, with at least one of the solutions containing a complexing agent that has chelating ability. This innovative approach is effective in making semiconductor surfaces free from harmful metallic impurities such as iron, aluminum, and zinc. Another notable patent is for the process of producing 3-tetrazolyl pyrido[1,2-a]pyrimidine derivatives. These derivatives are useful as an antiallergy agent and are produced through a reaction involving a cyano derivative of pyrido[1,2-a]pyrimidin-4-one compound and hydrazoic acid.
Career Highlights
Throughout his career, Hiroyoshi Nawa has worked with notable companies, including Wako Pure Chemical Industries, Inc. and Purex Co., Ltd. His expertise in surface treatment and pharmaceutical chemistry has allowed him to develop innovative solutions that address complex challenges in these fields.
Collaborations
Nawa has collaborated with esteemed colleagues such as Masami Ishihara and Hiroshi Ogata. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
Hiroyoshi Nawa's contributions to innovation in surface treatment and pharmaceutical chemistry are noteworthy. His patents reflect a commitment to advancing technology and improving industry standards. His work continues to influence the fields he is involved in, showcasing the importance of innovation in solving real-world problems.