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Nagaoka-Shi, Niigata, Japan

Hokuetsu Paper Mills, Ltd.

USPTO Granted Patents = 10

CIPO Patents = 3

Forward Citations = 60

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28 inventors (with patents filed for the assignee):

Toshihiko Soyama (4 out of 12 patents)

Hisatake Sato (3 out of 19 patents)

Shigehiko Yoshioka (3 out of 7 patents)

4. Hideto Yamada (3 out of 6 patents)

5. Masashi Sato (2 out of 3 patents)

6. Eiko Meguro (2 out of 3 patents)

7. Nobuyuki Sakadume (2 out of 3 patents)

8. Yoshio Adachi (2 out of 3 patents)

9. Tsuneo Yoshida (2 out of 2 patents)

10. Norio Kawano (1 out of 3 patents)

11. Saburo Furusho (1 out of 1 patent)

12. Shigeru Wakamoto (1 out of 1 patent)

13. Kazuro Isomae (1 out of 4 patents)

14. Mikiko Gokano (1 out of 3 patents)

15. Hiroshi Suzuki (1 out of 15 patents)

10 patents: Sort by Forward Citations

1. 8662316 - Filter medium for liquid filtration and process for producing the same (2014-03-04),

2. 7553394 - Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin (2009-06-30),

3. 7547339 - Filter material take-up product for air filter (2009-06-16),

4. 7520912 - Air purifying filter media and process for producing the same (2009-04-21),

5. 6939386 - Filter medium for air filter and method for its production (2005-09-06),

6. 4902382 - Process for producing a neutral paper (1990-02-20),

7. 4882087 - Aqueous dispersed solution of substituted succinic anhydride and process (1989-11-21),

8. 4810301 - Composition for sizing agent and process for using the same composition (1989-03-07),

9. 4717452 - Composition for sizing agent and process for using the same composition (1988-01-05),

10. 4118231 - Light-sensitive silver halide photographic materials containing (1978-10-03),

Hokuetsu Paper Mills, Ltd. is a leading paper manufacturing company headquartered in Japan. Founded in 1907, the company has a long history of producing high-quality paper products for various industries. Hokuetsu Paper Mills is committed to sustainable practices and innovation in paper production, offering a range of eco-friendly paper solutions. With a strong focus on customer satisfaction and quality, the company continues to be a trusted partner for businesses worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

10 Patents

#1 in Nagaoka-Shi, Niigata

#4,283 in Japan

#54,238 in the World

Nagaoka-Shi, Niigata, Japan

Hokuetsu Paper Mills, Ltd.

Forward Citations = 60

28 inventors:

Toshihiko Soyama (4 out of 12 patents)

Hisatake Sato (3 out of 19 patents)

Shigehiko Yoshioka (3 out of 7 patents)

4. Hideto Yamada (3 out of 6 patents)

5. Masashi Sato (2 out of 3 patents)

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