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

Patent Owner(s)

Patent Owner	Address
GUILD ASSOCIATES INC	5750 SHIER-RINGS ROAD DUBLIN OH 43016

International Classification(s)

• B01D:SEPARATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Feaver, William B	Columbus, OH	5	26
Karwacki, Christopher J	Churchville, MD	14	49
Rossin, Joseph A	Columbus, OH	41	343

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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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
July 03, 2007	US,7238332,B2   US7238332B2	GRANTED PATENT AS SECOND PUBLICATION
December 15, 2005	US,20050276738,A1   US20050276738A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7238332

Material and process for the filtration of nitric acid and NO.sub.2 from streams of air

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