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

Patent Owner(s)

Patent Owner	Address
PK INTERNATIONAL INC	2112 222 RIVERFRONT AVENUE SW CALGARY T2P 0X2

International Classification(s)

• C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
• F17D:PIPE-LINE SYSTEMS; PIPE-LINES
• C10G:CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HY....
• C11D:DETERGENT COMPOSITIONS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Dewalt, Christy Lee	Fox Creek, CA	1	0
Duff, Dianne Elizabeth	Fox Creek, CA	1	0

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
7.5 Year Payment	$3600.00	$1800.00	$900.00	Apr 22, 2027
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Apr 22, 2031

Fee	Large entity fee	small entity fee	micro entity fee
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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
October 22, 2019	US,10450498,B2   US10450498B2	GRANTED PATENT AS SECOND PUBLICATION
October 13, 2016	US,20160298020,A1   US20160298020A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 10450498

Heavy oil modification and productivity restorers

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