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Showa Shell Sekiyu K.k.

Calculating rank

USPTO Granted Patents = 46

% Expired Patents = 15.2

EPO Patents = 1

Trademarks = 2

Forward Citations = 924

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77 inventors (with patents filed for the assignee):

Yoshiichi Suzuki (13 out of 29 patents)

Katsumi Kushiya (11 out of 11 patents)

Noriko Yamakawa (7 out of 15 patents)

4. Ichiro Kawamura (6 out of 14 patents)

5. Hideki Hakuma (5 out of 8 patents)

6. Takashi Hagiwara (5 out of 29 patents)

7. Hiroyuki Mogamiya (5 out of 13 patents)

8. Porponth Sichanugrist (5 out of 6 patents)

9. Tetsuo Tsuchiya (4 out of 6 patents)

10. Takahisa Kase (4 out of 5 patents)

11. Takahiro Ozaki (3 out of 8 patents)

12. Muneyori Tachiyuki (3 out of 3 patents)

13. Koichi Numazawa (3 out of 3 patents)

14. Shigenori Sakuma (3 out of 5 patents)

15. Tomoo Munakata (3 out of 3 patents)

Core Competencies:

Thin Film Solar Cell

CIS Technology

Photovoltaic Device

Manufacturing Method

Durability Testing

Electrical Power Control

Heat Exchanger

Liquid Crystal Compounds

Gas Oil Desulfurization

Electro-Luminescence

Lubricating Grease

Ultra Fine Particles

46 patents: Sort by Forward Citations

1. 9450116 - Thin film solar cell and manufacturing method therefor (2016-09-20),

2. 9413183 - Quick charging system, control device, method of controlling amount of the stored electrical power, and program (2016-08-09),

3. 8691619 - Laminated structure for CIS based solar cell, and integrated structure and manufacturing method for CIS based thin-film solar cell (2014-04-08),

4. 8614114 - Process for producing light absorbing layer in CIS based thin-film solar cell (2013-12-24),

5. 8603853 - Method for manufacturing a solar cell module provided with an edge space (2013-12-10),

6. 8575478 - Integrated structure of CIS based solar cell (2013-11-05),

7. 8501519 - Method of production of CIS-based thin film solar cell (2013-08-06),

8. 8242795 - Method of testing durability of CIS based thin-film solar cell module (2012-08-14),

9. 8093096 - Method of successive high-resistance buffer layer/window layer (transparent conductive film) formation for CIS based thin-film solar cell and apparatus for successive film formation for practicing the method of successive film formation (2012-01-10),

10. 7989256 - Method for manufacturing CIS-based thin film solar cell (2011-08-02),

11. 7977139 - Method for manufacturing CIS based thin film solar cell device (2011-07-12),

12. 7960642 - CIS based thin-film photovoltaic module and process for producing the same (2011-06-14),

13. 7799212 - Method for preventing fouling of a heat exchanger for cooling residue from a hydrodesulfurization/hydrocracking process (2010-09-21),

14. 7629301 - Grease composition (2009-12-08),

15. 6092669 - Equipment for producing thin-film solar cell (2000-07-25),

Company Overview

Showa Shell Sekiyu K.K., headquartered in Tokyo, specializes in advanced energy solutions, focusing on the development and manufacturing of innovative photovoltaic technologies. The company is recognized for its expertise in thin film solar cells and CIS-based solar cells, contributing to the renewable energy sector. Additionally, Showa Shell engages in the production of liquid crystal compounds and gas oil desulfurization catalysts, while also exploring advancements in electro-luminescence devices and quick charging systems, emphasizing durability and efficiency in its offerings.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

46 Patents

#839 in Tokyo

#1,809 in Japan

#15,136 in the World

Showa Shell Sekiyu K.k.

Forward Citations = 924

77 inventors:

Yoshiichi Suzuki (13 out of 29 patents)

Katsumi Kushiya (11 out of 11 patents)

Noriko Yamakawa (7 out of 15 patents)

4. Ichiro Kawamura (6 out of 14 patents)

5. Hideki Hakuma (5 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Showa Shell Sekiyu K.k.. Retrieved from https://idiyas.com/company/showa-shell-sekiyu-k-k

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]

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