Waste hydrogen recovery device of evaluation device of hydrogen refueling station
US-2022290811-A1 · Sep 15, 2022 · US
by purging
by purging · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F17C2227/044 |
| Official title | by purging |
| Display label | by purging |
| Total patents | 104 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 7 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 17 |
| 2021 | 8 |
| 2022 | 13 |
| 2023 | 13 |
| 2024 | 16 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pressure vessel system for a motor vehicle
US-11441738-B2 · Sep 13, 2022 · US
Valve and reservoir(s) for pressurized fluid
US-11408535-B2 · Aug 9, 2022 · US
Valve and device for storing and dispensing pressurized fluid
US-11333267-B2 · May 17, 2022 · US
Valve and reservoir(s) for pressurized fluid
US-11313490-B2 · Apr 26, 2022 · US
Device and method for filling with liquefied gas
US-2022042649-A1 · Feb 10, 2022 · US
Hydrogen gas supply device
US-2021370222-A1 · Dec 2, 2021 · US
Hydrogen fueling station with integrated ammonia cracking unit
US-11167732-B1 · Nov 9, 2021 · US
Service device for a pressure vessel system
US-11168841-B2 · Nov 9, 2021 · US
Method and supply equipment for supplying fluorine gas-containing gas
US-2021341103-A1 · Nov 4, 2021 · US
Method for measuring the quantity of gas introduced into a reservoir and filling station
US-11162640-B2 · Nov 2, 2021 · US
Method for measuring the quantity of gas introduced into a reservoir and filling station
US-2021293385-A1 · Sep 23, 2021 · US
Method of purging a dual purpose LNG/LIN storage tank
US-10989358-B2 · Apr 27, 2021 · US
Material, storage container using the material, valve attached to the storage container, method of storing ClF and method of using ClF storage container
US-10982811-B2 · Apr 20, 2021 · US
Thermal-activated pressure relief device for fuel cell vehicle
US-2020365917-A1 · Nov 19, 2020 · US
Pivotable touchscreen for a gas-distribution facility
US-10823336-B2 · Nov 3, 2020 · US
Valve and reservoir(s) for pressurized fluid
US-2020318744-A1 · Oct 8, 2020 · US
Gas Filling Apparatus
US-2020318791-A1 · Oct 8, 2020 · US
Valve and reservoir(s) for pressurized fluid
US-2020300371-A1 · Sep 24, 2020 · US
Gas filling apparatus
US-10774991-B1 · Sep 15, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F17C2227/044?
- CPC F17C2227/044 is the Cooperative Patent Classification code for “by purging.”
- How many patents are filed under CPC F17C2227/044 (by purging)?
- Our database includes 104 publications tagged with this CPC code.
- Is patent activity under CPC F17C2227/044 growing?
- Publication counts under this code: 16 in 2024 vs 7 in 2025 (latest complete years).