Patent holdings for IPC class C09K 8/12

Total number of patents in this class: 585

10-year publication summary

61
45
46
32
36
18
26
23
18
0
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Halliburton Energy Services, Inc.
20419
134
Saudi Arabian Oil Company
12423
45
Schlumberger Canada Limited
7147
24
Schlumberger Technology B.v.
5068
24
Services Petroliers Schlumberger
5626
24
Schlumberger Technology Corporation
10241
21
CURTIS, Philip, Anthony
496
14
Schlumberger Holdings Limited
2867
13
China University of Petroleum (Beijing)
271
11
Prad Research and Development Limited
2696
11
M-I L.L.C.
855
10
S.p.c.m. SA
288
10
Toyo Seikan Group Holdings, Ltd.
805
10
Chevron Phillips Chemical Company LP
1818
8
Aramco Services Company
3744
6
Ecolab USA Inc.
5338
6
BASF SE
20403
5
China Petroleum & Chemical Corporation
1780
5
CNPC USA Corp.
134
5
Kuraray Co., Ltd.
3461
5
Other owners 194