This inventor holds 3 USPTO granted patents. Top assignees: Nippon Kokan Kabushiki Kaisha, Toshin Seiko Kabushiki Kaisha, Himeji Tekko Refine Co., Ltd.. Active years: 1983.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
3 out of 487 
3 out of 9 
1 out of 1 Years Active: 1983
Title: Hisashi Watanabe: Innovator in Metal Recovery and Steelmaking Technologies
Introduction
Hisashi Watanabe is a notable inventor based in Himeji, Japan. He has made significant contributions to the fields of metal recovery and steelmaking through his innovative methods. With a total of 3 patents to his name, Watanabe's work has had a considerable impact on industrial processes.
Latest Patents
Watanabe's latest patents include a method for recovering useful metals from dust discharged from metal refining processes. This method involves charging dust containing ferric oxide, zinc oxide, and lead oxide into a rotary kiln along with a carbonaceous reducing agent. The kiln operates under a reducing atmosphere, allowing for the vaporization of zinc and lead while reducing ferric oxide to ferrous oxide. The process also includes a step for reoxidizing ferrous oxide back to ferric oxide, which optimizes the use of the reducing agent.
Another significant patent is a method for preheating steel scrap using exhaust gas from a steelmaking electric furnace. This method directs exhaust gas to a combustion chamber, where carbon monoxide is combusted to create a combustion exhaust gas. This gas is then used to preheat steel scrap to a prescribed temperature, enhancing the efficiency of the steelmaking process.
Career Highlights
Throughout his career, Watanabe has worked with prominent companies such as Nippon Kokan Kabushiki Kaisha and Toshin Seiko Kabushiki Kaisha. His experience in these organizations has allowed him to develop and refine his innovative techniques in metal recovery and steelmaking.
Collaborations
Watanabe has collaborated with notable coworkers, including Takasaburo Date and Toshimichi Maki. Their combined expertise has contributed to advancements in the technologies they have worked on together.
Conclusion
Hisashi Watanabe's contributions to the fields of metal recovery and steelmaking demonstrate his innovative spirit and commitment to improving industrial processes. His patents reflect a deep understanding of the complexities involved in these areas, making him a significant figure in the industry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile