- 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: 2728
10-year publication summary
|
147
|
171
|
228
|
223
|
229
|
203
|
197
|
228
|
250
|
196
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13600 |
142 |
| Sika Technology AG | 2901 |
133 |
| Halliburton Energy Services, Inc. | 21015 |
128 |
| Holcim Technology Ltd. | 583 |
90 |
| Construction Research & Technology GmbH | 637 |
68 |
| BASF SE | 21083 |
51 |
| Dow Global Technologies LLC | 10509 |
46 |
| Aramco Services Company | 4083 |
32 |
| Wacker Chemie AG | 2108 |
29 |
| Lafarge | 126 |
28 |
| GCP Applied Technologies Inc. | 470 |
22 |
| Etex Services NV | 57 |
22 |
| HeidelbergCement AG | 79 |
21 |
| Schlumberger Technology Corporation | 11013 |
20 |
| Roman Cement, LLC | 48 |
20 |
| United States Gypsum Company | 907 |
20 |
| Hsustainability GmbH | 48 |
20 |
| CarbonCure Technologies Inc. | 88 |
18 |
| Heidelberg Materials AG | 97 |
16 |
| Amrize Technology Switzerland LLC | 539 |
16 |
| Other owners | 1786 |