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

Patent Owner(s)

Patent Owner	Address
UNIV NORTH CHINA	TAIYUAN SHANXI 030051 XUEYUAN ROAD JIANCAOPING AREA OF NORTH UNIVERSITY OF CHINA 3#

International Classification(s)

• C05G:MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DI....
• C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
• C05C:NITROGENOUS FERTILISERS
• C05B:PHOSPHATIC FERTILISERS
• D06M:TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D0....

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• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
LIU, Yaqing	Taiyuan, TW	32	22
TONG, Yingfang	Taiyuan, CN	2	0
XIANG, Yang	Taiyuan, CN	54	319
ZHAO, Guizhe	Taiyuan, CN	28	22

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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	Oct 20, 2026
7.5 Year Payment	$3600.00	$1800.00	$900.00	Oct 20, 2030
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Oct 20, 2034

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: 2023/0123,541

BIODEGRADABLE UREA-FORMALDEHYDE-BASED SAND-FIXING POLYMER MATERIAL WITH SLOW NUTRIENT RELEASE AND WATER ABSORPTION AND RETENTION

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