Company Filing History:
2 out of 220 
1 out of 4,979 Years Active: 1989
Title: Keiji Kumagai: Innovator in Catalysts and IC Card Technology
Introduction
Keiji Kumagai is a notable inventor based in Saitama, Japan. He has made significant contributions to the fields of catalysis and electronic identification technology. With a total of 2 patents, his work reflects a commitment to innovation and practical applications.
Latest Patents
Kumagai's latest patents include a hydrotreating catalyst and a process of manufacture. This hydrotreating catalyst comprises silica/alumina or a silica/alumina-containing carrier with 2 to 35 wt. % silica and Group VIII and/or Group VIB metals as hydrogenation active components. The preparation involves a first step of impregnation with at least one Group VIII metal, followed by a second step of impregnation with at least one Group VIB metal. The impregnation is preferably conducted via ion exchange using a complex salt, such as an ammine or amine salt of the metal. The carrier is characterized by a maximum of pores in the 30 to 100 Å range and a minimum of pores in the 0 to 30 Å and in the 300 Å+ range. Another significant patent is for an IC card equipped with a solar battery. This IC card features a plastic card body that houses a CPU, RAM, ROM, and an EEPROM for identification purposes. Due to the high power consumption of the EEPROM, a tandem type solar battery with multiple opto-electric conversion cells laminated on a substrate is utilized. This innovative IC card can operate solely with the solar battery mounted inside, eliminating the need for a secondary battery.
Career Highlights
Throughout his career, Kumagai has worked with prominent companies such as Toa Nenryo Kogyo and Oki Electric Industry Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced technologies.
Collaborations
Kumagai has collaborated with notable coworkers, including Ikuo Akizuki and Hiroshi Kaya. Their joint efforts have likely enhanced the innovation process and led to successful outcomes in their projects.
Conclusion
Keiji Kumagai's contributions to the fields of catalysis and electronic identification technology demonstrate his innovative spirit and dedication to advancing practical solutions. His patents reflect a blend of scientific knowledge and real-world application, marking him as a significant figure in his field.