- All sections
- C - Chemistrymetallurgy
- C04B - Limemagnesiaslagcementscompositions thereof, e.g. mortars, concrete or like building materialsartificial stoneceramicsrefractoriestreatment of natural stone
- C04B 28/04 - Portland cements
Patent holdings for IPC class C04B 28/04
Total number of patents in this class: 2941
10-year publication summary
|
186
|
250
|
239
|
251
|
226
|
229
|
261
|
284
|
234
|
163
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sika Technology AG | 3015 |
152 |
| Saudi Arabian Oil Company | 14305 |
150 |
| Halliburton Energy Services, Inc. | 21309 |
131 |
| Construction Research & Technology GmbH | 600 |
73 |
| Holcim Technology Ltd. | 487 |
70 |
| BASF SE | 21306 |
53 |
| Dow Global Technologies LLC | 10994 |
52 |
| Amrize Technology Switzerland LLC | 720 |
51 |
| Aramco Services Company | 4192 |
32 |
| Wacker Chemie AG | 2111 |
29 |
| Lafarge | 120 |
27 |
| Hsustainability GmbH | 62 |
25 |
| Schlumberger Technology Corporation | 11879 |
23 |
| GCP Applied Technologies Inc. | 472 |
23 |
| Etex Services NV | 61 |
22 |
| HeidelbergCement AG | 78 |
21 |
| Amrize Technology Switzerland LLC | 43 |
21 |
| Roman Cement, LLC | 48 |
20 |
| Heidelberg Materials AG | 104 |
20 |
| CarbonCure Technologies Inc. | 87 |
19 |
| Other owners | 1927 |