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

Patent Owner(s)

Patent Owner	Address
INKA CORPORATION	1502 UPLAND AVENUE BOULDER CO 80304

International Classification(s)

• B43K:IMPLEMENTS FOR WRITING OR DRAWING

• 2007 Application Filing Year
• B43K Class
• 136 Applications Filed
• 84 Patents Issued To-Date
• 61.77 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Adelman, Gregory M	Boulder, CO	52	822
# of filed Patents : 52 Total Citations : 822

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Patent Citation Ranking

• 0 Citation Count
• B43K Class

• 0 % this patent is cited more than
• 18 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: 8839612

Method for operating an exhaust system of an internal combustion engine

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Abstract

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A method for operating an exhaust system of an internal combustion engine, wherein nitrogen oxide (NO_x) is reduced by use of a SCR catalytic converter and wherein the ageing state of the SCR catalytic converter is monitored, characterized in that during a temporally limited phase having a high proportion of nitrogen oxide (NO_x) in the exhaust gas, a conversion of said SCR catalytic converter is acquired and evaluated and the ageing state of said SCR catalytic converter is suggested therefrom.

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Description

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Claims

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Legal Events

 

• LAPS2022
• STCH2022
• FP2022
• FEPP2022
• MAFP2018
• I2014
• STCF2014
• AS2013
• P2012
• AS2012
• F2012
• PD2011

Date	Code	Event	Description
Oct 31, 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: LARGE ENTITY
Oct 31, 2022	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Sep 23, 2022	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Sep 23, 2022
May 16, 2022	FEPP	FEE PAYMENT PROCEDURE	free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Mar 15, 2018	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) year of fee payment: 4
Sep 23, 2014	I	Issuance
Sep 03, 2014	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Jan 24, 2013	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHRISTMAS, MICHAEL C.;HALL, TREVOR;SIGNING DATES FROM 20130109 TO 20130110;REEL/FRAME:029685/0352 Owner name: RENOLD PLC., UNITED KINGDOM
Sep 06, 2012	P	Published
Mar 05, 2012	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHERER, STEFAN;GLOECKLE, MARKUS;PFISTER, TOBIAS;REEL/FRAME:028248/0480 Owner name: ROBERT BOSCH GMBH, GERMANY Effective Date: Mar 05, 2012
Feb 23, 2012	F	Filing
Feb 23, 2011	PD	Priority Date