- 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: 2639
10-year publication summary
|
164
|
186
|
250
|
238
|
251
|
225
|
227
|
261
|
255
|
102
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 12808 |
139 |
| Halliburton Energy Services, Inc. | 20697 |
135 |
| Sika Technology AG | 2837 |
124 |
| Holcim Technology Ltd. | 956 |
100 |
| Construction Research & Technology GmbH | 651 |
68 |
| BASF SE | 20728 |
50 |
| Dow Global Technologies LLC | 10328 |
45 |
| Aramco Services Company | 3897 |
31 |
| Lafarge | 131 |
29 |
| Wacker Chemie AG | 2102 |
29 |
| GCP Applied Technologies Inc. | 460 |
22 |
| HeidelbergCement AG | 80 |
21 |
| United States Gypsum Company | 920 |
20 |
| Schlumberger Technology Corporation | 10597 |
19 |
| Roman Cement, LLC | 47 |
19 |
| Hsustainability GmbH | 39 |
19 |
| Etex Services NV | 55 |
18 |
| CarbonCure Technologies Inc. | 83 |
16 |
| Chryso | 129 |
15 |
| Saint-Gobain Weber | 173 |
15 |
| Other owners | 1705 |