Détention brevets de la classe C09K 8/502

Brevets de cette classe: 227

Historique des publications depuis 10 ans

21
29
13
11
19
18
12
6
6
3
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20788
55
Saudi Arabian Oil Company
12911
27
M-I L.L.C.
815
15
Schlumberger Technology Corporation
10652
12
Aramco Services Company
3927
10
Lamberti SpA
254
9
Schlumberger Canada Limited
7266
5
Schlumberger Technology B.v.
5160
5
Schlumberger Holdings Limited
2839
5
Prad Research and Development Limited
2693
5
Services Petroliers Schlumberger
5771
5
Baker Hughes Incorporated
5279
4
ENI S.p.A.
1257
4
CURTIS, Philip, Anthony
436
4
Schlumberger Norge AS
73
3
BP Exploration Operating Company Limited
264
3
Chevron Phillips Chemical Company LP
1836
3
Baker Hughes Oilfield Operations, LLC
2283
3
China University of Petroleum (East China)
370
2
Elkem AS
61
2
Autres propriétaires 46