- All sections
- C - Chemistry; metallurgy
- C04B - Lime; magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics; refractories; treatment of natural stone
- C04B 28/04 - Portland cements
Patent holdings for IPC class C04B 28/04
Total number of patents in this class: 2371
10-year publication summary
|
148
|
164
|
186
|
249
|
238
|
249
|
224
|
221
|
239
|
92
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
138 |
| Saudi Arabian Oil Company | 11322 |
129 |
| Sika Technology AG | 2650 |
105 |
| Holcim Technology Ltd. | 868 |
92 |
| Construction Research & Technology GmbH | 640 |
61 |
| BASF SE | 19740 |
49 |
| Dow Global Technologies LLC | 10147 |
42 |
| Lafarge | 137 |
29 |
| Aramco Services Company | 3504 |
27 |
| Wacker Chemie AG | 2091 |
27 |
| United States Gypsum Company | 1019 |
24 |
| HeidelbergCement AG | 82 |
21 |
| GCP Applied Technologies Inc. | 451 |
20 |
| Roman Cement, LLC | 45 |
19 |
| Hconnect 2 GmbH | 62 |
18 |
| Etex Services NV | 50 |
17 |
| Schlumberger Technology Corporation | 9690 |
15 |
| CarbonCure Technologies Inc. | 80 |
15 |
| Saint-Gobain Weber | 175 |
15 |
| CURTIS, Philip, Anthony | 497 |
14 |
| Other owners | 1494 |