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

Patent Owner(s)

Patent Owner	Address
3M INNOVATIVE PROPERTIES COMPANY	P O BOX 33427 ST PAUL MN 55133-3427

International Classification(s)

• B01D:SEPARATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Gregerson, Glen O	Hudson, US	23	96

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
3.5 Year Payment	$1600.00	$800.00	$400.00	Feb 18, 2024
7.5 Year Payment	$3600.00	$1800.00	$900.00	Feb 18, 2028
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Feb 18, 2032

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 3.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge - 7.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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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
August 18, 2020	US,10744441,B2   US10744441B2	GRANTED PATENT AS SECOND PUBLICATION
February 14, 2019	US,20190046910,A1   US20190046910A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 10744441

Air filter with spiral-wrapped frame

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