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

Patent Owner(s)

Patent Owner	Address
BAYER MATERIALSCIENCE AG	KONZERNBEREICH BP D-51368 LEVERKUSEN

International Classification(s)

• B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
• B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bierdel, Michael	Leverkusen, DE	29	120
König, Thomas	Leverkusen, DE	66	264
Liesenfelder, Ulrich	Bergisch Gladbach, DE	38	144

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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	Jul 16, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jul 16, 2029

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
January 16, 2018	US,9868245,B2   US9868245B2	GRANTED PATENT AS SECOND PUBLICATION
April 28, 2011	US,20110096617,A1   US20110096617A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9868245

Screw elements for extruding plastic compositions

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