Location History:
- Chiba, JP (2016 - 2019)
- Tokyo, JP (2016 - 2024)
Company Filing History:
8 out of 29 
3 out of 1,792 
1 out of 612 
Years Active: 2016-2025
Title: The Innovative Contributions of Ryuta Haga
Introduction
Ryuta Haga is a prominent inventor based in Chiba, Japan, known for his significant contributions to the field of lithium-ion battery technology. With a total of nine patents to his name, Haga has made remarkable advancements that enhance the performance and efficiency of battery materials.
Latest Patents
Haga's latest patents include a carbon material designed for the negative electrode of lithium-ion secondary batteries. This innovative material boasts a small particle diameter, high initial charge-discharge efficiency, and an impressive 2 C discharge rate. The carbon material achieves both excellent input-output characteristics and durability. Specifically, the carbon material features a 50% by volume particle diameter in a cumulative frequency distribution ranging from 1.0 μm to less than 5.0 μm. Additionally, it has a specific surface area of 6.5 m/g or less, a tap density of 0.70 g/cm³ or more, and a Raman R value between 0.100 and 0.300. The carbon material is characterized by a carbonaceous film on the surface of graphitized material particles of a mesophase microbead. Furthermore, Haga has developed a method for producing carbonaceous substance-coated graphite particles, which involves adhering a modified novolac-type phenolic resin to graphite particles and subsequently carbonizing them in a non-oxidizing atmosphere.
Career Highlights
Throughout his career, Ryuta Haga has worked with notable companies such as JFE Chemical Corporation and JFE Steel Corporation. His experience in these organizations has contributed to his expertise in materials science and battery technology.
Collaborations
Haga has collaborated with esteemed colleagues, including Tetsuo Shiode and Makiko Ijiri, to further advance his research and innovations in the field of lithium-ion batteries.
Conclusion
Ryuta Haga's innovative work in developing advanced materials for lithium-ion batteries has positioned him as a key figure in the industry. His contributions continue to influence the future of battery technology and energy storage solutions.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.