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Hamari Chemicals, Ltd.

USPTO Granted Patents = 20

% Expired Patents = 15.0

CIPO Patents = 3

EPO Patents = 7

Trademarks = 6

Forward Citations = 138

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57 inventors (with patents filed for the assignee):

Sadayuki Maeda (6 out of 6 patents)

Yasuhiro Nishimura (5 out of 6 patents)

Hiroki Moriwaki (3 out of 3 patents)

4. Tatsunori Sato (3 out of 3 patents)

5. Naomichi Mitsumori (3 out of 3 patents)

6. Masahiro Takaya (3 out of 4 patents)

7. Aki Kawashima (2 out of 2 patents)

8. Akie Kawamura (2 out of 2 patents)

9. Ryosuke Takeda (2 out of 2 patents)

10. Vadim A Soloshonok (2 out of 2 patents)

11. Hajime Fujimura (2 out of 16 patents)

12. Michito Karasawa (2 out of 2 patents)

13. Takuzo Otani (2 out of 2 patents)

14. Katsuo Aizawa (2 out of 6 patents)

15. Mari Uchimoto (2 out of 2 patents)

20 patents: Sort by Forward Citations

1. 11084846 - Method for producing peptide (2021-08-10),

2. 9695112 - Method for synthesizing optically active α-amino acid using chiral metal complex comprising axially chiral N-(2-acylaryl)-2-[5,7-dihydro-6H-dibenzo[c,e]azepin-6-yl] acetamide compound and amino acid (2017-07-04),

3. 9688612 - Axially chiral N-(2-acylaryl)-2-[5,7-dihydro-6h-dibenzo[c,e]azepin-6-yl] acetamide compound and chirality interconversion method of a-amino acid using the same (2017-06-27),

4. 9174899 - Method for producing optically active alcohols (2015-11-03),

5. 9108986 - Method for producing optically active tetrahydroquinolines (2015-08-18),

6. 8445669 - Production process of ethynylthymidine compounds from 5-methyluridine as a starting material (2013-05-21),

7. 8222452 - Method for producing optically active amines (2012-07-17),

8. 7622469 - 2,4-diamino-1,3,5-triazine derivatives (2009-11-24),

9. 6358999 - Use of zinc tranexamate in the treatment of diabetes (2002-03-19),

10. 5238931 - Inflammatory bowel disease preventive and curative agent containing zinc (1993-08-24),

11. 5055469 - Quaternary pyridinium salts useful for ulcer treatment (1991-10-08),

12. 4981846 - Crystalline L-carnosine zinc complex having antiulcer activity (1991-01-01),

13. 4965064 - Pheophorbide derivatives (1990-10-23),

14. 4950667 - Pyridinyl acetamide compounds useful in treating ulcers (1990-08-21),

15. 4927817 - Preventive and therapeutic agent against liver disorder (1990-05-22),

Hamari Chemicals, Ltd. is a prominent player in the chemical manufacturing sector, specializing in the development and production of a diverse range of chemical products. The company focuses on innovative solutions for various industries, including pharmaceuticals, agriculture, and materials science. With a strong emphasis on research and development, Hamari Chemicals is dedicated to advancing chemical technologies that enhance product performance and sustainability. Headquartered in Osaka, Japan, the company serves both domestic and international markets.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

20 Patents

#321 in Osaka

#2,944 in Japan

#31,233 in the World

Hamari Chemicals, Ltd.

Forward Citations = 138

57 inventors:

Sadayuki Maeda (6 out of 6 patents)

Yasuhiro Nishimura (5 out of 6 patents)

Hiroki Moriwaki (3 out of 3 patents)

4. Tatsunori Sato (3 out of 3 patents)

5. Naomichi Mitsumori (3 out of 3 patents)

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