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

Patent Owner(s)

Patent Owner	Address
LI MENG JUN	Not Provided

International Classification(s)

• C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
• C07D:HETEROCYCLIC COMPOUNDS
• D21H:PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED....
• D06L:BLEACHING, e.g. OPTICAL BLEACHING, DRY-CLEANING, O....

• 2013 Application Filing Year
• C09K Class
• 2036 Applications Filed
• 1761 Patents Issued To-Date
• 86.50 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Li, Eric Ji Wei	Surrey, CA	3	0
# of filed Patents : 3 Total Citations : 0
Li, Meng Jun	Surrey, CA	3	0
# of filed Patents : 3 Total Citations : 0

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• 0 Citation Count
• C09K Class

• 0 % this patent is cited more than
• 10 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Feb 18, 2027

Fee	Large entity fee	small entity fee	micro entity fee
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
August 18, 2015	US,9109331,B2   US9109331B2	GRANTED PATENT AS SECOND PUBLICATION
June 11, 2015	US,20150159331,A1   US20150159331A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9109331

Fluorescent brighter #71 used for the papermaking process

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Abstract

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Fluorescent whitening agent 71 (FB #71) 4,4′-bis[4-anilino-6-morpholino-1,3,5-triazin-2-yl]amino-2,2′-stilbene disodium salt (CAS #16090-02-1) is used on the wet-end papermaking process and coating papermaking process to increase the brightness of paper.

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Description

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Claims

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Legal Events

 

• PD2025
• MAFP2022
• MAFP2018
• I2015
• STCF2015
• P2015
• F2013

Date	Code	Event	Description
Mar 02, 2025	PD	Priority Date
Nov 07, 2022	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8
Aug 21, 2018	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4
Aug 18, 2015	I	Issuance
Jul 29, 2015	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Jun 11, 2015	P	Published
Nov 07, 2013	F	Filing