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USPTO Data Jan 1 1976 - Dec 9 2025
6 Patents
#2,218 in Tokyo
#5,840 in Japan
Nippon Ketjen Co., Ltd.
Forward Citations = 88
42 inventors:
Nippon Ketjen Co., Ltd.
CIPO Patents = 19
EPO Patents = 4
Forward Citations = 88
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42 inventors (with patents filed for the assignee):
Katsuhisa Fujita (4 out of 8 patents)
Satoshi Abe (4 out of 7 patents)
Akira Hino (3 out of 35 patents)
4. Tetsuro Kamo (2 out of 6 patents)
5. Masafumi Shimowake (2 out of 4 patents)
6. Marcel Adriaan Jansen (1 out of 9 patents)
7. Franciscus Wilhelmus Van Houtert (1 out of 2 patents)
8. Toshiyuki Ado (1 out of 1 patent)
9. Naohiro Nishimoto (1 out of 1 patent)
10. Yasuhito Takahashi (1 out of 1 patent)
11. Mark De Boer (1 out of 3 patents)
12. Frans Lodewijk Plantenga (1 out of 20 patents)
13. Yoshimasa Inoue (1 out of 4 patents)
14. Naohiro Nishimoto (0 patent)
15. Satoshi Abe (0 patent)
6 patents:
Nippon Ketjen Co., Ltd. is a leading Japanese company specializing in the production of catalysts and adsorbents. With a history spanning over 90 years, Nippon Ketjen has established itself as a trusted partner for a wide range of industries, including petrochemical, environmental, and pharmaceutical. The company's innovative solutions and commitment to quality have earned them a strong reputation in the market.
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19 patents (CIPO):
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4 patents (EPO):
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