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Japan Super Quartz Corporation

USPTO Granted Patents = 65

% Expired Patents = 24.6

EPO Patents = 62

Trademarks = 6

Forward Citations = 73

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36 inventors (with patents filed for the assignee):

Hiroshi Kishi (18 out of 41 patents)

Masaki Morikawa (16 out of 16 patents)

Masanori Fukui (14 out of 23 patents)

4. Toshiaki Sudo (14 out of 48 patents)

5. Minoru Kanda (11 out of 12 patents)

6. Takeshi Fujita (8 out of 13 patents)

7. Yoshiyuki Tsuji (8 out of 10 patents)

8. Eriko Suzuki (7 out of 13 patents)

9. Takuma Yoshioka (6 out of 12 patents)

10. Toshio Tsujimoto (5 out of 5 patents)

11. Satoshi Kudo (4 out of 13 patents)

12. Masaru Sato (4 out of 6 patents)

13. Tadahiro Sato (3 out of 19 patents)

14. Atsushi Shimazu (3 out of 3 patents)

15. Kouta Hasebe (2 out of 7 patents)

Core Competencies:

Vitreous Silica

Silica Crucible

Single Crystal

Manufacturing Method

High-Purity Silica

Temperature Distribution

Fused Silica

Purification Process

Carbon Electrode

Mold Production

Fluid-Cooled Mold

Surface Modification

65 patents: Sort by Forward Citations

1. 9469560 - Method of manufacturing vitreous silica crucible, vitreous silica crucible (2016-10-18),

2. 9260795 - Closure for silica glass crucible, silica glass crucible and method of handling the same (2016-02-16),

3. 9187357 - Vitreous silica crucible having outer, intermediate, and inner layers (2015-11-17),

4. 9150447 - Silica crucible for pulling silicon single crystal and method of producing the same (2015-10-06),

5. 9085480 - Method of manufacturing vitreous silica crucible (2015-07-21),

6. 8980004 - Crucible and method for pulling a single crystal (2015-03-17),

7. 8951346 - Silica glass crucible for pulling up silicon single crystal and method for manufacturing thereof (2015-02-10),

8. 8936685 - Vitreous silica crucible for pulling silicon single crystal and method of manufacturing the same (2015-01-20),

9. 8936684 - Vitreous silica crucible (2015-01-20),

10. 8888915 - High-purity vitreous silica crucible used for pulling large-diameter single-crystal silicon ingot (2014-11-18),

11. 8887374 - Method of manufacturing fused silica crucible (2014-11-18),

12. 8871026 - Vitreous silica crucible for pulling single-crystal silicon and method of manufacturing the same (2014-10-28),

13. 8844321 - Apparatus and method for manufacturing vitreous silica crucible (2014-09-30),

14. 8806892 - Method of manufacturing vitreous silica crucible (2014-08-19),

15. 8774959 - Method of calculating temperature distribution of crucible (2014-07-08),

Company Overview

Japan Super Quartz Corporation, based in Akita, specializes in the development and manufacturing of vitreous silica crucibles, which are essential for the production of single crystal materials. The company focuses on high-purity silica and advanced purification processes to ensure optimal temperature distribution during manufacturing. With a commitment to innovation in fused silica technology, Japan Super Quartz plays a crucial role in supporting industries that require precision materials for semiconductor and optical applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

65 Patents

#1 in Akita 016-0892

#1,472 in Japan

#11,332 in the World

Japan Super Quartz Corporation

Forward Citations = 73

36 inventors:

Hiroshi Kishi (18 out of 41 patents)

Masaki Morikawa (16 out of 16 patents)

Masanori Fukui (14 out of 23 patents)

4. Toshiaki Sudo (14 out of 48 patents)

5. Minoru Kanda (11 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Japan Super Quartz Corporation. Retrieved from https://idiyas.com/company/japan-super-quartz

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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