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For the Inventor, By the Inventor

Akashishi, Japan

Maruo Calcium Company Limited


USPTO Granted Patents = 35



Trademarks = 1

Forward Citations = 172

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44 inventors (with patents filed for the assignee):

goldMedal Shiro Minayoshi (12 out of 12 patents)

silverMedal Hisakazu Hojo (10 out of 10 patents)

bronzeMedal Hidemitsu Kasahara (9 out of 9 patents)

4.  Shigeo Takiyama (9 out of 9 patents)

5.  Naoki Kubota (7 out of 7 patents)

6.  Seiya Shimizu (6 out of 6 patents)

7.  Minoru Hanazaki (6 out of 18 patents)

8.  Hidehiko Nishioka (6 out of 6 patents)

9.  Mitsunobu Aoyama (5 out of 5 patents)

10.  Hiroshi Shibata (4 out of 13 patents)

11.  Yoichi Takahashi (3 out of 10 patents)

12.  Kouhei Sako (3 out of 3 patents)

13.  Katsunori Fukumoto (3 out of 3 patents)

14.  Naofumi Saitoh (3 out of 3 patents)

15.  Noritsugu Ebisuya (3 out of 3 patents)


35 patents:

1. 11186699 - Calcium carbonate filler for resins, and resin composition containing same (2021-11-30),
2. 10336888 - Surface-treated calcium carbonate filler for curable resin composition, and curable resin composition containing filler (2019-07-02),
3. 9926428 - Calcium carbonate filler for resin and resin composition including said filler (2018-03-27),
4. 9815971 - Heavy calcium carbonate, production method therefor, and resin composition containing said calcium carbonate (2017-11-14),
5. 9815953 - Calcium carbonate filler for resin, and resin composition containing said filler (2017-11-14),
6. 9422419 - Surface-treated calcium carbonate filler, and curable resin composition containing the filler (2016-08-23),
7. 9018278 - Surface treated calcium carbonate filler for resin and resin composition containing the filler (2015-04-28),
8. 8975322 - Calcium carbonate filler for resin, process for producing the same, and resin composition containing the filler (2015-03-10),
9. 8404619 - Particulate plant treatment composition (2013-03-26),
10. 8138253 - Filler for powder coating material and powder coating composition containing the same (2012-03-20),
11. 7977410 - Fine pore formation agent for porous resin film and composition containing the same for porous resin film (2011-07-12),
12. 7863367 - Surface treated calcium carbonate and a resin composition containing the same (2011-01-04),
13. 7785705 - Flower thinning agent (2010-08-31),
14. 7341704 - Surface-treated calcium carbonate, method for production thereof and resin composition comprising said calcium carbonate (2008-03-11),
15. 7264834 - Food-additive slurry composition and powder composition, and food composition containing these (2007-09-04),
Maruo Calcium Company Limited is a global leader in the production and distribution of calcium-based products. With a wide range of offerings including calcium carbonate, calcium citrate, and calcium lactate, Maruo Calcium supplies these essential minerals to various industries such as food and beverage, pharmaceuticals, cosmetics, and agriculture. Committed to quality and innovation, Maruo Calcium focuses on delivering sustainable solutions that meet the ever-growing demand for high-quality calcium products worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

35 Patents

#1 in Akashishi

#2,076 in Japan

#18,610 in the World

...
Akashishi, Japan

Maruo Calcium Company Limited

Forward Citations = 172

44 inventors:

goldMedal Shiro Minayoshi (12 out of 12 patents)

silverMedal Hisakazu Hojo (10 out of 10 patents)

bronzeMedal Hidemitsu Kasahara (9 out of 9 patents)

4.  Shigeo Takiyama (9 out of 9 patents)

5.  Naoki Kubota (7 out of 7 patents)

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