- 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: 327
10-year publication summary
|
28
|
20
|
32
|
15
|
19
|
16
|
12
|
7
|
31
|
12
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FLSmidth A/S | 923 |
33 |
| ThyssenKrupp Industrial Solutions AG | 729 |
27 |
| ThyssenKrupp AG | 3086 |
23 |
| KHD Humboldt Wedag GmbH | 192 |
22 |
| Holcim Technology Ltd. | 868 |
15 |
| Polysius AG | 55 |
13 |
| Fives FCB | 51 |
6 |
| CEMAG Anlagenbau Dessau GmbH | 7 |
5 |
| Sudbayerisches Portland-zementwerk Gebr. Wiesbock & Co. GmbH | 13 |
5 |
| Mitsubishi Ube Cement Corporation | 46 |
5 |
| Andritz Oy | 276 |
4 |
| Italcementi S.p.A. | 83 |
4 |
| thyssenkrupp Polysius GmbH | 47 |
4 |
| Air Products and Chemicals, Inc. | 1448 |
3 |
| Carmeuse Lime, Inc. | 38 |
3 |
| Lafarge | 137 |
3 |
| Pyrogenesis Canada, Inc. | 67 |
3 |
| Refractory Intellectual Property GmbH & Co. KG | 502 |
3 |
| SCHEUCH GmbH | 24 |
3 |
| ThyssenKrupp Polysius Aktiengesellschaft | 29 |
3 |
| Other owners | 140 |