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

Patent Owner(s)

Patent Owner	Address
MARQUETTE UNIVERSITY	P O BOX 1881 MILWAUKEE WI 53201-1881

International Classification(s)

• H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
• G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Josse, Fabien J	Milwaukee, WI	5	231
# of filed Patents : 5 Total Citations : 231
Shana, Zack A	Milwaukee, WI	2	104
# of filed Patents : 2 Total Citations : 104

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Patent Citation Ranking

• 84 Citation Count
• H01L Class

• 97.73 % this patent is cited more than
• 30 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
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 No: 5455475

Piezoelectric resonant sensor using the acoustoelectric effect

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Abstract

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An AT cut quartz crystal resonator has an unbalanced electrode geometry to induce a particularly strong electrical field in a surface of the resonator adjacent a medium. The electrical field will interact with ions and dipoles in the medium and may be used to accurately and repeatably measure the electrical characteristics of the medium. Specific examples are provided illustrating the use of a sensor designed in accord with the invention in sensing dilute electrolytes, and other applications are contemplated.

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Description

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Claims

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Legal Events

 

• STCH2007
• LAPS2007
• FP2007
• REMI2007
• SULP2003
• FPAY2003
• REMI2003
• FPAY1999
• FEPP1998
• FEPP1998
• AS1996
• I1995
• F1993
• PD1993

Date	Code	Event	Description
Oct 29, 2007	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Oct 29, 2007	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: LARGE ENTITY
Oct 03, 2007	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Oct 03, 2007
Apr 18, 2007	REMI	MAINTENANCE FEE REMINDER MAILED
Sep 18, 2003	SULP	SURCHARGE FOR LATE PAYMENT	year of fee payment: 7
Sep 18, 2003	FPAY	FEE PAYMENT	year of fee payment: 8
Apr 23, 2003	REMI	MAINTENANCE FEE REMINDER MAILED
Apr 02, 1999	FPAY	FEE PAYMENT	year of fee payment: 4
Dec 04, 1998	FEPP	FEE PAYMENT PROCEDURE	free format text: PAT HLDR NO LONGER CLAIMS SMALL ENT STAT AS SMALL BUSINESS (ORIGINAL EVENT CODE: LSM2); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Dec 02, 1998	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Mar 14, 1996	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JOSSE, FABIEN J.;SHANA, ZACK A.;REEL/FRAME:007863/0759 Owner name: MARQUETTE UNIVERSITY, WISCONSIN Effective Date: Mar 14, 1996
Oct 03, 1995	I	Issuance
Nov 01, 1993	F	Filing
Nov 01, 1993	PD	Priority Date