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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
SUMCO CORPORATION	2-1 SHIBAURA 1-CHOME MINATO-KU TOKYO 105-8634

International Classification(s)

• C03C:CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREO....
• C30B:SINGLE-CRYSTAL GROWTH

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
FUJIWARA, Hideki	Tokyo, JP	114	691
KISHI, Hiroshi	Akita, JP	143	1432
KITAHARA, Eriko	Akita, JP	20	35
OHARA, Masami	Akita, JP	11	38

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
3.5 Year Payment	$1600.00	$800.00	$400.00	Feb 22, 2028
7.5 Year Payment	$3600.00	$1800.00	$900.00	Feb 22, 2032
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Feb 22, 2036

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 3.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge - 7.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent Application No: 2024/0279,106

QUARTZ GLASS CRUCIBLE, MANUFACTURING METHOD THEREOF, AND MANUFACTURING METHOD OF SILICON SINGLE CRYSTAL

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