Ushiku, Japan

Hisashi Gunjishima

This inventor holds 1 USPTO granted patent. Top assignee: Mitsui Minings & Melting Co., Ltd.. Active years: 1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hisashi Gunjishima. Retrieved from https://idiyas.com/inventor/hisashi-gunjishima

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


% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 1

Forward Citations = 4(Granted Patents)


Company Filing History:


Years Active: 1993

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1 patent (USPTO):Explore Patents

Title: Hisashi Gunjishima: Innovator in Battery Recycling Technology

Introduction

Hisashi Gunjishima is a notable inventor based in Ushiku, Japan. He has made significant contributions to the field of battery recycling, particularly in the recovery of cadmium from used nickel-cadmium batteries. His innovative approach addresses environmental concerns associated with battery disposal.

Latest Patents

Hisashi Gunjishima holds a patent for a method for processing used batteries. This invention focuses on recovering cadmium through heat treatment. The method allows for the easy separation of the plastic case from the battery body without the risk of cadmium leakage. By volatilizing cadmium in a non-oxidizing atmosphere, high purity cadmium can be recovered efficiently. He has 1 patent to his name.

Career Highlights

Gunjishima is associated with Mitsui Mining & Smelting Co., Ltd., where he has been instrumental in advancing battery recycling technologies. His work not only contributes to the company's innovation portfolio but also promotes sustainable practices in the industry.

Collaborations

Some of his notable coworkers include Masaharu Onoue and Junichiro Tanaka. Their collaborative efforts have further enhanced the research and development of battery recycling methods.

Conclusion

Hisashi Gunjishima's contributions to battery recycling technology exemplify the importance of innovation in addressing environmental challenges. His work continues to pave the way for more sustainable practices in the industry.

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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