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

Patent Owner(s)

Patent Owner	Address
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE	PARIS FRANCE PARIS PARIS

International Classification(s)

• F25J:LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GAS....
• C10L:FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYN....
• B01D:SEPARATION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
BIGEARD, Sarah	Sassenage, FR	2	12
GARNAUD, Delphine	Grenoble, FR	3	12
HASSE, David J	Middletown, US	22	339
KULKARNI, Sudhir S	Wilmington, US	56	601
SANDERS,, JR Edgar S	Newark, US	30	216
ZICK, Golo	Fontaine, FR	25	53

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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	Nov 19, 2025
7.5 Year Payment	$3600.00	$1800.00	$900.00	Nov 19, 2029
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Nov 19, 2033

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
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

Full Text

US Patent Application No: 2022/0152,552

METHOD FOR PURIFYING BIOGAS THROUGH MEMBRANES AT NEGATIVE TEMPERATURES

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