% Expired Patents = 50.0

Forward Citations = 16

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3 inventors (with patents filed for the assignee):

Masanori Fukui (2 out of 23 patents)

Yoshiyuki Tsuji (2 out of 10 patents)

Ken-ichi Hiroshima (2 out of 2 patents)

2 patents: Sort by Forward Citations

1. 6808744 - Method for preparing and regenerating a composite crucible (2004-10-26),

2. 6524668 - Composite crucible, and preparation method and regeneration method thereof (2003-02-25),

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USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#526 in

#11,139 in Japan

JP

Mitsubishi Material Quartz Corporation

Forward Citations = 16

3 inventors:

Masanori Fukui (2 out of 23 patents)

Yoshiyuki Tsuji (2 out of 10 patents)

Ken-ichi Hiroshima (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mitsubishi Material Quartz Corporation. Retrieved from https://idiyas.com/company/mitsubishi-material-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]