- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F23L - Supplying air or non-combustible liquids or gases to combustion apparatus in general; valves or dampers specially adapted for controlling air supply or draught in combustion apparatus; inducing draught in combustion apparatus; tops for chimneys or ventilating shafts; terminals for flues
- F23L 9/04 - Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air beyond the fire, i.e. nearer the smoke outlet
Patent holdings for IPC class F23L 9/04
Total number of patents in this class: 37
10-year publication summary
|
7
|
0
|
1
|
3
|
1
|
4
|
1
|
1
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| General Electric Company | 17803 |
2 |
| General Electric Technology GmbH | 1602 |
2 |
| Martin GmbH fur Umwelt-und Energietechnik | 55 |
2 |
| Stuv S.A. | 18 |
2 |
| Alstom Technology Ltd | 1146 |
1 |
| Siemens Energy, Inc. | 1734 |
1 |
| Andritz Technology and Asset Management GmbH | 90 |
1 |
| Charlton & Jenrick Limited | 6 |
1 |
| Doosan Babcock Limited | 30 |
1 |
| Fortum Oyj | 97 |
1 |
| Grace, Lance Carl | 1 |
1 |
| Grace, Tyler Mainord | 1 |
1 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3585 |
1 |
| Linde Aktiengesellschaft | 1551 |
1 |
| Marcakis, Emmanuel | 5 |
1 |
| Outotec (Finland) Oy | 489 |
1 |
| Power Systems Synectics Limited | 2 |
1 |
| Stork Thermeq B.V. | 8 |
1 |
| Tata Steel Nederland Technology BV | 144 |
1 |
| ThyssenKrupp Industrial Solutions AG | 700 |
1 |
| Other owners | 13 |