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Top 50 Key Players companies in Diesel exhaust fluid
by Most Patent Citation in the world in 2022

The Diesel exhaust fluid top 50 is Discovery PatSnap’ annual ranking of the top 50 Most Patent Citation Diesel exhaust fluid Key Players in the world. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2022, ranking from differnt perspectives, including patent filing intensity, academic research capability, news media heat. The company list is generated from various data types.
Diesel exhaust fluid (DEF) is an aqueous urea solution made with 32.5% urea and 67.5% deionized water. It is standardised as AUS 32 (aqueous urea solution) in ISO 22241. DEF is a consumable in selective catalytic reduction (SCR) that lowers NOₓ concentration in the diesel exhaust emissions from diesel engines.
#
Company Name
Region
Tech Topics
Total
1
patent citation: 92
2
Vicenza, Italy
patent citation: 57
3
patent citation: 40
4
patent citation: 38
5
Shopping mall,Truck
patent citation: 38
6
patent citation: 36
7
patent citation: 36
8
patent citation: 36
9
patent citation: 28
10
patent citation: 23
11
patent citation: 22
12
patent citation: 19
13
Maharashtra, India
Automotive catalyst,Cisco Catalyst
patent citation: 19
14
patent citation: 16
15
patent citation: 15
16
United Kingdom
patent citation: 15
17
patent citation: 14
18
patent citation: 14
19
Denmark
patent citation: 12
20
Special purpose entity
patent citation: 10
21
patent citation: 9
22
Brussels Hoofdstedelijk Gewest, Belgium
patent citation: 8
23
Sweden
patent citation: 8
24
patent citation: 7
25
Netherlands
Stamicarbon,Chemical engineering,Fertilizer,
...[+1]
patent citation: 6
26
Health care,Biopharmaceutical,Drug,
...[+2]
patent citation: 5
27
patent citation: 5
28
patent citation: 4
29
patent citation: 4
30
patent citation: 4
31
patent citation: 3
32
Chassis,Solenoid,Automation,
...[+2]
patent citation: 3
33
Automotive engineering,New Car Assessment Program,Automotive systems,
...[+2]
patent citation: 3
34
patent citation: 3
35
patent citation: 2
36
patent citation: 1
37
South Korea
patent citation: 1
38
South Korea
Customer expectation,Automotive engineering,Public transport,
...[+2]
patent citation: 1
39
Brenntag UK Ltd.
United Kingdom
patent citation: 1
40
patent citation: 1
41
patent citation: 1
42
patent citation: 1
43
patent citation: 1
44
patent citation: 0
45
patent citation: 0
46
patent citation: 0
47
Syddanmark, Denmark
patent citation: 0
48
patent citation: 0
49
Brussels Hoofdstedelijk Gewest, Belgium
Hydrogen,Advertising,Gasoline
patent citation: 0
50
patent citation: 0
Page generation time: May 11 2025