C21C 2100/04
Recirculation of the exhaust gas
C21C2100/04 (Recirculation of the exhaust gas) appears on 9 US grants and 20 published applications in this corpus.
Search patents in C21C- Granted patents
- 9
- Published applications
- 20
- Assignees
- 13
- Inventors
- 56
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 4 |
| 2023 | 0 | 4 |
| 2024 | 2 | 2 |
| 2025 | 3 | 4 |
| 2026 | 1 | 1 |
By publication year. 2026 runs to 8 Oct.
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