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
2
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20672
56
Saudi Arabian Oil Company
12761
27
M-I L.L.C.
821
15
Schlumberger Technology Corporation
10567
11
Aramco Services Company
3892
10
Lamberti SpA
256
9
Schlumberger Canada Limited
7190
5
Schlumberger Technology B.v.
5130
5
Schlumberger Holdings Limited
2847
5
Prad Research and Development Limited
2695
5
Services Petroliers Schlumberger
5731
5
Baker Hughes Incorporated
5301
4
ENI S.p.A.
1253
4
CURTIS, Philip, Anthony
446
4
Schlumberger Norge AS
73
3
BP Exploration Operating Company Limited
265
3
Chevron Phillips Chemical Company LP
1828
3
Baker Hughes Oilfield Operations, LLC
2236
3
China University of Petroleum (East China)
362
2
Elkem AS
61
2
Autres propriétaires 46