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Ponnaiyan Ayyappan
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Cedar Falls, IA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Exhaust gas treatment system and method with four-way catalyzed fil...
Patent number
11,668,221
Issue date
Jun 6, 2023
Deere & Company
Eric J. Hruby
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Exhaust gas treatment system and method with four-way catalyzed fil...
Patent number
11,187,127
Issue date
Nov 30, 2021
Deere & Company
Eric J. Hruby
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Exhaust gas treatment system and method having improved low tempera...
Patent number
10,767,532
Issue date
Sep 8, 2020
Deere & Company
Danan Dou
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Exhaust gas treatment system and method having improved low tempera...
Patent number
10,718,245
Issue date
Jul 21, 2020
Deere & Company
Danan Dou
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Diesel exhaust fluid formulation that reduces urea deposits in exha...
Patent number
8,999,277
Issue date
Apr 7, 2015
Deere & Company
Ponnaiyan Ayyappan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Diesel exhaust fluid formulation that reduces urea deposits in exha...
Patent number
8,961,818
Issue date
Feb 24, 2015
Deere & Company
Ponnaiyan Ayyappan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
EXHAUST GAS TREATMENT SYSTEM AND METHOD WITH FOUR-WAY CATALYZED FIL...
Publication number
20220034247
Publication date
Feb 3, 2022
Deere & Company
Eric J. Hruby
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Application
EXHAUST GAS TREATMENT SYSTEM AND METHOD WITH FOUR-WAY CATALYZED FIL...
Publication number
20200408121
Publication date
Dec 31, 2020
Deere & Company
Eric J. Hruby
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
EXHAUST GAS TREATMENT SYSTEM AND METHOD HAVING IMPROVED LOW TEMPERA...
Publication number
20190383186
Publication date
Dec 19, 2019
Deere & Company
Danan Dou
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Application
EXHAUST GAS TREATMENT SYSTEM AND METHOD HAVING IMPROVED LOW TEMPERA...
Publication number
20190383192
Publication date
Dec 19, 2019
Deere & Company
Danan Dou
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Application
DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHA...
Publication number
20140369911
Publication date
Dec 18, 2014
Ponnaiyan Ayyappan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHA...
Publication number
20140369910
Publication date
Dec 18, 2014
Ponnaiyan Ayyappan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
DIESEL EXHAUST FLUID FORMULATION HAVING A HIGH AMMONIUM CONTENT AND...
Publication number
20130028817
Publication date
Jan 31, 2013
Deere & Company
Ponnaiyan Ayyappan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL