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Asahi Kasei E-Materials Corporation

USPTO Granted Patents = 86

% Expired Patents = 30.2

CIPO Patents = 1

EPO Patents = 32

Trademarks = 8

Forward Citations = 200

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140 inventors (with patents filed for the assignee):

Hiroshi Murata (7 out of 67 patents)

Keitaro Ameyama (7 out of 8 patents)

Tadashi Ino (6 out of 22 patents)

4. Jun Koike (6 out of 17 patents)

5. Naoto Miyake (6 out of 16 patents)

6. Masahiro Kondo (6 out of 28 patents)

7. Hiroaki Takanohashi (5 out of 9 patents)

8. Masahiro Ohashi (5 out of 7 patents)

9. Yuzuru Sakakibara (5 out of 6 patents)

10. Masaki Ishikawa (5 out of 25 patents)

11. Fujito Yamaguchi (5 out of 10 patents)

12. Yuki Uchida (4 out of 19 patents)

13. Naoki Sakamoto (4 out of 18 patents)

14. Yoshimichi Mitamura (4 out of 8 patents)

15. Hiroshi Hatayama (4 out of 13 patents)

Core Competencies:

Electricity Storage

Separator

Porous Membrane

Polyolefin

Redox Flow Battery

Nonaqueous Electrolyte

Battery Technology

Microporous Film

Lithium Ion

Layered Product

Coating Composition

Semiconductor

86 patents: Sort by Forward Citations

1. 10811659 - Separator for electricity storage device, laminate and porous film (2020-10-20),

2. 10766169 - Resin mold (2020-09-08),

3. 10693114 - Polyolefin-based porous film and method for producing the same (2020-06-23),

4. 10680223 - Laminated separator, polyolefin microporous membrane, and separator for electricity storage device (2020-06-09),

5. 10578962 - Self-supporting film, self-supporting structure, method for manufacturing self-supporting film, and pellicle (2020-03-03),

6. 10276849 - Separator including polyolefin microporous membrane and inorganic porous layer, and nonaqueous electrolyte battery using the same (2019-04-30),

7. 10246567 - Polyolefin microporous film (2019-04-02),

8. 10211474 - Redox flow secondary battery and electrolyte membrane for redox flow secondary battery (2019-02-19),

9. 10189781 - Onium salt and composition comprising the same (2019-01-29),

10. 10153473 - Separator for electricity storage device, laminate and porous film (2018-12-11),

11. 9991488 - Polyolefin-based porous film and method for producing the same (2018-06-05),

12. 9966583 - Laminated polyolefin microporous membrane including propylene copolymer and method of producing the same (2018-05-08),

13. 9941498 - Polyolefin-based porous film and method for producing the same (2018-04-10),

14. 9911960 - Porous membrane and multilayer porous membrane (2018-03-06),

15. 9911959 - Porous membrane and multilayer porous membrane (2018-03-06),

Asahi Kasei E-Materials Corporation, headquartered in Tokyo, specializes in the development and manufacturing of advanced electricity storage devices. The company focuses on innovative technologies such as separators, porous membranes, and polyolefin materials, which are essential for enhancing battery performance. Their expertise extends to redox flow batteries and nonaqueous electrolytes, positioning them at the forefront of battery technology. Asahi Kasei E-Materials is committed to advancing energy solutions that support sustainable development.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Asahi Kasei E-Materials Corporation

86 Patents

#600 in Tokyo

#1,240 in Japan

#8,853 in the World

Asahi Kasei E-Materials Corporation

Forward Citations = 200

140 inventors:

Hiroshi Murata (7 out of 67 patents)

Keitaro Ameyama (7 out of 8 patents)

Tadashi Ino (6 out of 22 patents)

4. Jun Koike (6 out of 17 patents)

5. Naoto Miyake (6 out of 16 patents)

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