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

Patent Owner(s)

Patent Owner	Address
NIPPON CHEMICAL INDUSTRIAL CO LTD	9-11-1 KAMEIDO KOTO-KU TOKYO 1368515 ?1368515
TORO GANRYO KOGYO CO LTD	NO 26-5 SAKASHITA 3-CHOME ITABASHI-KU TOKYO

International Classification(s)

• C09C:TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBRO....

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• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Abe, Nobuyoshi	Urawa, JP	3	81
Kanemaru, Kiyoshi	Urawa, JP	2	71
Yokoyama, Minoru	Tokyo, JP	79	694

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
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 No: 4375373

Method of coating inorganic pigments (ultramarine and bronze powder) with dense amorphous silica

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