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

Patent Owner(s)

Patent Owner	Address
AIR PRODUCTS AND CHEMICALS INC	1940 AIR PRODUCTS BOULEVARD PATENT DEPT ALLENTOWN PA 18106-5500

International Classification(s)

• B01D:SEPARATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Abel, Alan D	Allentown, PA	3	107
Waldron, William E	North Catasauqua, PA	1	15
Wells, Theodore F	Allentown, PA	2	45

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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: 4995889

Control of product withdrawal from a sorptive separation system

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