% Expired Patents = 25.0

CIPO Patents = 1

Trademarks = 2

Forward Citations = 11

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12 inventors (with patents filed for the assignee):

Kazuya Kitasaka (2 out of 2 patents)

Shinji Hirose (1 out of 9 patents)

Reiko Iikawa (1 out of 1 patent)

4. Satoru Moriya (1 out of 1 patent)

5. Kazuhiro Umehara (1 out of 1 patent)

6. Ryota Nishioka (1 out of 1 patent)

7. Hatsumi Shimajiri (1 out of 1 patent)

8. Koichi Sugihara (1 out of 1 patent)

9. Takashi Harimoto (1 out of 1 patent)

10. Hajimu Kitahara (1 out of 2 patents)

11. Tadashi Doi (1 out of 6 patents)

12. Naobumi Oi (1 out of 6 patents)

13. Takashi Harimoto (0 patent)

4 patents: Sort by Forward Citations

1. 8733150 - Column and method of evaluation of contaminated condition of gas (2014-05-27),

2. 7241625 - Carbonyl compound scavenger and method of quantifying carbonyl compound using the same (2007-07-10),

3. 6436311 - Sampling material for a carbonyl compound in a gas (2002-08-20),

4. 4963254 - Packing material for chromatographic use (1990-10-16),

Company Overview

Sumika Chemical Analysis Service, Limited is a leading provider of chemical analysis services for a wide range of industries. With state-of-the-art equipment and a team of experienced professionals, we offer high-quality testing, analysis, and consultation services to help our clients ensure the safety and quality of their products. Our services include material testing, environmental analysis, and product development support. Visit our website for more information.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#808 in Osaka

#7,588 in Japan

Osaka, Japan

Sumika Chemical Analysis Service, Limited

Forward Citations = 11

12 inventors:

Kazuya Kitasaka (2 out of 2 patents)

Shinji Hirose (1 out of 9 patents)

Reiko Iikawa (1 out of 1 patent)

4. Satoru Moriya (1 out of 1 patent)

5. Kazuhiro Umehara (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumika Chemical Analysis Service, Limited. Retrieved from https://idiyas.com/company/sumika-chemical-analysis-service

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

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]

1 patent (CIPO):

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]