- All sections
- C - Chemistrymetallurgy
- C04B - Limemagnesiaslagcementscompositions thereof, e.g. mortars, concrete or like building materialsartificial stoneceramicsrefractoriestreatment of natural stone
- C04B 41/91 - After-treatment of mortars, concrete, artificial stone or ceramicsTreatment of natural stone of only ceramics involving the removal of part of the materials of the treated articles, e.g. etching
Patent holdings for IPC class C04B 41/91
Total number of patents in this class: 206
10-year publication summary
|
16
|
15
|
17
|
12
|
23
|
15
|
13
|
16
|
19
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microban Products Company | 310 |
9 |
| General Electric Company | 17076 |
7 |
| Rolls-Royce Corporation | 1718 |
5 |
| Honeywell International Inc. | 13614 |
4 |
| Kyocera Corporation | 13525 |
4 |
| Denka Company Limited | 2502 |
4 |
| Sumitomo Electric Industries, Ltd. | 15199 |
3 |
| Hitachi Metals, Ltd. | 1995 |
3 |
| Corning Incorporated | 10139 |
3 |
| Lam Research Corporation | 5111 |
3 |
| Daicel Polymer Ltd. | 75 |
3 |
| Goertek Inc. | 2617 |
3 |
| II-VI Delaware, Inc. | 1694 |
3 |
| Rolls-Royce High Temperature Composites, Inc. | 132 |
3 |
| Toda Kogyo Corporation | 337 |
3 |
| Momentum Optics LLC | 4 |
3 |
| Rtx Corporation | 9232 |
3 |
| Siemens AG | 24560 |
2 |
| Centre National de La Recherche Scientifique | 10188 |
2 |
| Matsushita Electric Industrial Co., Ltd. | 2188 |
2 |
| Other owners | 134 |