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

Patent Owner(s)

Patent Owner	Address
SOOCHOW UNIVERSITY	215000 8 JI XUE ROAD XIANGCHENG DISTRICT SUZHOU JIANGSU SUZHOU CITY JIANGSU PROVINCE 215000

International Classification(s)

• C23C:COATING METALLIC MATERIAL; COATING MATERIAL WITH M....
• G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
He, Jinghui	Jiangsu, CN	6	4
# of filed Patents : 6 Total Citations : 4
Lu, Jianmei	Jiangsu, CN	59	24
# of filed Patents : 59 Total Citations : 24

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Patent Citation Ranking

• 2 Citation Count
• C23C Class

• 27.20 % this patent is cited more than
• 8 Age

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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	Jun 12, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jun 12, 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
December 12, 2017	US,9841411,B2   US9841411B2	GRANTED PATENT AS SECOND PUBLICATION
July 20, 2017	US,20170205383,A1   US20170205383A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9841411

Ammonia gas sensor based on squaric acid derivative, preparation method and application thereof

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Abstract

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An ammonia gas sensor based on a squaric acid derivative includes an interdigital electrode and a coating material. The coating material is a squaric acid derivative of formula I, and said coating material is coated on said interdigital electrode through a vacuum coating process, and a thickness of said coating material is 100-200 nm.

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Description

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Claims

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Legal Events

 

• LAPS2022
• STCH2022
• FP2021
• FEPP2021
• I2017
• PD2017
• STCF2017
• P2017
• F2017
• AS2017

Date	Code	Event	Description
Jan 17, 2022	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES	free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Jan 17, 2022	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Dec 12, 2021	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Dec 12, 2021
Aug 02, 2021	FEPP	FEE PAYMENT PROCEDURE	free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Dec 12, 2017	I	Issuance
Dec 12, 2017	PD	Priority Date
Nov 21, 2017	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Jul 20, 2017	P	Published
Jan 13, 2017	F	Filing
Jan 13, 2017	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LU, JIANMEI;HE, JINGHUI;REEL/FRAME:041356/0150 Owner name: SOOCHOW UNIVERSITY, CHINA Effective Date: Jan 13, 2017