- 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: 2676
10-year publication summary
|
164
|
186
|
250
|
239
|
251
|
225
|
227
|
261
|
260
|
131
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13091 |
139 |
| Halliburton Energy Services, Inc. | 20879 |
136 |
| Sika Technology AG | 2858 |
127 |
| Holcim Technology Ltd. | 991 |
106 |
| Construction Research & Technology GmbH | 641 |
67 |
| BASF SE | 20926 |
50 |
| Dow Global Technologies LLC | 10352 |
46 |
| Aramco Services Company | 3955 |
31 |
| Wacker Chemie AG | 2107 |
29 |
| Lafarge | 128 |
28 |
| GCP Applied Technologies Inc. | 466 |
22 |
| Etex Services NV | 57 |
22 |
| HeidelbergCement AG | 79 |
21 |
| United States Gypsum Company | 902 |
20 |
| Schlumberger Technology Corporation | 10705 |
19 |
| Roman Cement, LLC | 47 |
19 |
| Hsustainability GmbH | 39 |
19 |
| CarbonCure Technologies Inc. | 85 |
17 |
| Saint-Gobain Weber | 173 |
15 |
| Heidelberg Materials AG | 99 |
15 |
| Other owners | 1728 |