F04C 2210/224
Hydrogen
Official title: Hydrogen (H2)
F04C2210/224 (Hydrogen) appears on 6 US grants and 13 published applications in this corpus.
Search patents in F04C- Granted patents
- 6
- Published applications
- 13
- Assignees
- 8
- Inventors
- 29
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Hydrogen compressor28 Apr 2026US 12,613,013 B2Siemens Energy Global GmbH & Co. KG
- Rotary engine, parts thereof, and methods8 Apr 2025US 12,270,331 B2Astron Aerospace LLC
- Device for recirculating an at least partially gaseous composition containing hydrogen and fuel cell system16 Apr 2024US 11,959,478 B2Busch Produktions GmbH
- Hypotrochoid positive-displacement machine10 Jan 2023US 11,549,507 B2Genesis Advanced Technology Inc.
- Roots pump having a seal member with first and second projections7 Jun 2022US 11,353,021 B2Kabushiki Kaisha Toyota Jidoshokki
- Hydrogen production apparatus for a wind turbine, wind turbine arrangement and method for operating a hydrogen production apparatus for a wind turbine2 Jul 2026US 2026/0185252 A1Siemens Gamesa Renewable Energy A/S
- Rotary engine, parts thereof, and methods18 Dec 2025US 2025/0382912 A1Astron Aerospace LLC
- Hydrogen compressor15 May 2025US 2025/0155088 A1Siemens Energy Global GmbH & Co. KG
- Rotary engine, parts thereof, and methods17 Oct 2024US 2024/0344480 A1Astron Aerospace LLC
- Roots blower6 Apr 2023US 2023/0108876 A1Ogura Clutch Co., Ltd.
Most cited
By later US patents