- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F27B - Furnaces, kilns, ovens or retorts in generalopen sintering or like apparatus
- F27B 7/20 - Details, accessories or equipment specially adapted for rotary-drum furnaces
Patent holdings for IPC class F27B 7/20
Total number of patents in this class: 352
10-year publication summary
|
19
|
32
|
15
|
17
|
13
|
12
|
8
|
32
|
21
|
14
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FLSmidth A/S | 774 |
28 |
| KHD Humboldt Wedag GmbH | 192 |
25 |
| ThyssenKrupp AG | 3294 |
23 |
| ThyssenKrupp Industrial Solutions AG | 632 |
20 |
| Holcim Technology Ltd. | 997 |
13 |
| Polysius AG | 50 |
13 |
| thyssenkrupp Polysius GmbH | 132 |
12 |
| Andritz Oy | 284 |
6 |
| Fives FCB | 58 |
6 |
| CEMAG Anlagenbau Dessau GmbH | 7 |
5 |
| Sudbayerisches Portland-zementwerk Gebr. Wiesbock & Co. GmbH | 17 |
5 |
| Mitsubishi Ube Cement Corporation | 53 |
5 |
| Refractory Intellectual Property GmbH & Co. KG | 541 |
4 |
| Quantum IR Technologies, LLC | 19 |
4 |
| FLSmidth Cement A/S | 111 |
4 |
| Air Products and Chemicals, Inc. | 1443 |
3 |
| Alite GmbH | 18 |
3 |
| Carmeuse Lime, Inc. | 35 |
3 |
| Fives North American Combustion, Inc. | 45 |
3 |
| Italcementi S.p.A. | 68 |
3 |
| Other owners | 164 |