Détention brevets de la classe C09K 8/40

Brevets de cette classe: 417

Historique des publications depuis 10 ans

40
54
36
43
17
15
14
12
5
8
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21338
125
Saudi Arabian Oil Company
14235
55
Schlumberger Technology Corporation
11818
27
Schlumberger Canada Limited
7606
17
Services Petroliers Schlumberger
6024
17
Schlumberger Technology B.v.
5298
16
Flotek Chemistry, LLC
115
14
Prad Research and Development Limited
2661
12
Schlumberger Holdings Limited
2699
11
CURTIS, Philip, Anthony
331
11
Aramco Services Company
4195
6
Baker Hughes Oilfield Operations, LLC
2527
6
Baker Hughes Holdings LLC
3023
6
Chevron Phillips Chemical Company LP
1861
5
Oji Holdings Corporation
797
5
M-I L.L.C.
746
4
Rhodia Operations
1494
4
ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company
186
4
Exero Well Integrity
5
4
Board of Regents, The University of Texas System
6107
3
Autres propriétaires 65