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

Patent Owner(s)

Patent Owner	Address
CENTRAL ILLINOIS PUBLIC SERVICE COMPANY	607 EAST ADAMS A CORP OF IL SPRINGFIELD IL

International Classification(s)

• C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Butler, Robert S	Effingham, IL	4	19
Claerbout, Paul F	Effingham, IL	2	7
Cleland, Randy S	Hillsboro, IL	1	5
Kent, Louis P	Mattoon, IL	1	5
Micko, Richard E	Spokane, WA	1	5
Wilhelm, James H	Sandy, UT	15	146

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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: 4411875

Dual alkali process for combustion gas cleaning

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