Détention brevets de la classe C09K 8/502

Brevets de cette classe: 228

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.
20635
57
Saudi Arabian Oil Company
12683
27
M-I L.L.C.
828
15
Schlumberger Technology Corporation
10512
11
Aramco Services Company
3872
10
Lamberti SpA
259
9
Schlumberger Canada Limited
7146
5
Schlumberger Technology B.v.
5116
5
Schlumberger Holdings Limited
2852
5
Prad Research and Development Limited
2696
5
Services Petroliers Schlumberger
5705
5
Baker Hughes Incorporated
5316
4
ENI S.p.A.
1249
4
CURTIS, Philip, Anthony
454
4
Schlumberger Norge AS
73
3
BP Exploration Operating Company Limited
260
3
Chevron Phillips Chemical Company LP
1826
3
Baker Hughes Oilfield Operations, LLC
2211
3
China University of Petroleum (East China)
360
2
Elkem AS
61
2
Autres propriétaires 46