- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F27B - Furnaces, kilns, ovens, or retorts in general; open sintering or like apparatus
- F27B 7/20 - Rotary-drum furnaces, i.e. horizontal or slightly inclined - Details, accessories, or equipment peculiar to rotary-drum furnaces
Patent holdings for IPC class F27B 7/20
Total number of patents in this class: 341
10-year publication summary
|
20
|
32
|
15
|
19
|
16
|
12
|
8
|
33
|
21
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FLSmidth A/S | 859 |
29 |
| ThyssenKrupp AG | 3210 |
24 |
| ThyssenKrupp Industrial Solutions AG | 700 |
24 |
| KHD Humboldt Wedag GmbH | 194 |
23 |
| Holcim Technology Ltd. | 962 |
16 |
| Polysius AG | 54 |
13 |
| thyssenkrupp Polysius GmbH | 94 |
8 |
| Fives FCB | 53 |
6 |
| CEMAG Anlagenbau Dessau GmbH | 7 |
5 |
| Sudbayerisches Portland-zementwerk Gebr. Wiesbock & Co. GmbH | 13 |
5 |
| Mitsubishi Ube Cement Corporation | 52 |
5 |
| Andritz Oy | 280 |
4 |
| Quantum IR Technologies, LLC | 17 |
4 |
| FLSmidth Cement A/S | 84 |
4 |
| Air Products and Chemicals, Inc. | 1426 |
3 |
| Alite GmbH | 17 |
3 |
| Carmeuse Lime, Inc. | 36 |
3 |
| Italcementi S.p.A. | 71 |
3 |
| Lafarge | 133 |
3 |
| Pyrogenesis Canada, Inc. | 71 |
3 |
| Other owners | 153 |