Katsuta, Japan

Juichi Arai

This inventor holds 16 USPTO granted patents, plus 1 CIPO patent and 1 EPO patent, primarily in Lithium Secondary Batteries. Top assignees: Hitachi, Ltd., L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des, Hitachi Chemical Company, Ltd.. Active years: 1991-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Juichi Arai. Retrieved from https://idiyas.com/inventor/juichi-arai

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

Calculating rank

% Patents Active = 68.8



Average Co-Inventor Count = 3.1

ph-index = 9

Forward Citations = 216(Granted Patents)


Location History:

  • Shiraumemito, JP (1992)
  • Ibaraki Pref., JP (1991 - 1993)
  • Ibaraki-ken, JP (1999 - 2004)
  • Tokyo, JP (2004 - 2006)
  • Higashiibaraki-gun, JP (2006)
  • Katsura-mura, JP (2001 - 2010)
  • Ibaraki, JP (1993 - 2012)

Company Filing History:


Years Active: 1991-2012

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Areas of Expertise:
Artificial Graphite Particles
Nonaqueous Electrolyte
Lithium Secondary Cell
Organic Borate Compounds
Electrical Appliance
Fluorinated Solvent
Refrigerating Machine Oil
Magnetic Recording Medium
Silicon Diffusion Coating
Refractory Metal Shapes
Thin Copper Film
High Purity Metal Silicides
16 patents (USPTO):Explore Patents

Title: The Innovative Journey of Juichi Arai: Pioneering Advances in Graphite Technology

Introduction: Juichi Arai, an accomplished inventor from Katsura-mura, Japan, has made significant contributions to the field of graphite technology. With a robust portfolio consisting of 16 patents, Arai has become a prominent figure in the domain of energy storage materials, specifically focusing on lithium secondary cells and their components.

Latest Patents: Among his latest innovations, Arai has developed several patented technologies, including artificial graphite particles and methods for their manufacture. Notably, his work on nonaqueous electrolyte secondary cell negative electrodes and lithium secondary cells showcases a sophisticated secondary particle structure, wherein multiple primary particles of graphite are clustered or bonded together. This design features a unique layer structure, with the edges of the primary particles bent into a polyhedral shape, enhancing the performance and efficiency of battery technologies.

Career Highlights: Throughout his career, Juichi Arai has collaborated with several leading companies, including Hitachi, Ltd. and L'air Liquide, a powerful entity focused on industrial and specialty gases. His experiences at these companies have undoubtedly influenced his innovative approach and advancements in patentable technologies in the field.

Collaborations: Arai has worked alongside notable colleagues, including Hideaki Katayama and Mitsuru Kobayashi. Their collaborations have contributed to the success of various projects, thus enhancing Arai's reputation as a leading inventor in the field of energy storage solutions.

Conclusion: Juichi Arai's innovations continue to pave the way for advancements in battery technology, particularly in the development of artificial graphite particles. As his patents further contribute to the evolution of energy storage, Arai's work remains a testament to the importance of innovation and collaboration in scientific research and development.

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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