Pneumatic energy generation device
US-2025215907-A1 · Jul 3, 2025 · US
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Nitrogen
Nitrogen · 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 | F04B2015/0824 |
| Official title | {Nitrogen} |
| Display label | Nitrogen |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 6 |
| 2021 | 1 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compression apparatus and filling station comprising such an apparatus
US-12188461-B2 · Jan 7, 2025 · US
Compression apparatus and filling station comprising such an apparatus
US-12092098-B2 · Sep 17, 2024 · US
Compression apparatus and filling station comprising such an apparatus
US-2023085780-A1 · Mar 23, 2023 · US
Compression apparatus and filling station comprising such an apparatus
US-2023080231-A1 · Mar 16, 2023 · US
Compression apparatus and filling station comprising such an apparatus
US-2023071844-A1 · Mar 9, 2023 · US
Low disturbance cryocooler compressor
US-10947962-B1 · Mar 16, 2021 · US
Liquid supply system
US-2020232448-A1 · Jul 23, 2020 · US
Liquid supply system
US-2020032785-A1 · Jan 30, 2020 · US
Liquid supply system
US-2020011323-A1 · Jan 9, 2020 · US
Liquid supply system
US-2020011322-A1 · Jan 9, 2020 · US
Liquid supply system
US-2020003195-A1 · Jan 2, 2020 · US
Heat insulation structure and liquid supply system
US-2020003196-A1 · Jan 2, 2020 · US
Liquid supply system
US-2019353148-A1 · Nov 21, 2019 · US
Pump with wear-resistant barrel and plunger having coating support
US-10393111-B2 · Aug 27, 2019 · US
Pump with plunger having tribological coating
US-9909582-B2 · Mar 6, 2018 · US
Pump with wear-resistant barrel and plunger having coating support
US-2017096998-A1 · Apr 6, 2017 · US
Pump with plunger having tribological coating
US-2016222959-A1 · Aug 4, 2016 · US
Liquid nitrogen pump equipment load testing and experimenting apparatus and testing and experimenting method thereof
US-9127655-B2 · Sep 8, 2015 · US
Liquid supply system
US-8991658-B2 · Mar 31, 2015 · US