Devices and methods for replacing tested flow meter in liquid hydrogen flow measurement standard facility
US-2026092804-A1 · Apr 2, 2026 · US
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by vacuum
by vacuum · 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 | F17C2227/045 |
| Official title | by vacuum |
| Display label | by vacuum |
| Total patents | 8 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be declining based on the most recent years.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2018 | 4 |
| 2020 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and system for managing liquid supply
US-10854484-B1 · Dec 1, 2020 · US
Facility for distributing working gas
US-2018224068-A1 · Aug 9, 2018 · US
Anti-spike pressure management of pressure-regulated fluid storage and delivery vessels
US-2018180225-A1 · Jun 28, 2018 · US
Anti-spike pressure management of pressure-regulated fluid storage and delivery vessels
US-9897257-B2 · Feb 20, 2018 · US
Method for producing a tank, in particular a motor vehicle tank
US-9879826-B2 · Jan 30, 2018 · US
Method for Producing a Tank, In Particular a Motor Vehicle Tank
US-2015300571-A1 · Oct 22, 2015 · US
Anti-spike pressure management of pressure-regulated fluid storage and delivery vessels
US-2015247605-A1 · Sep 3, 2015 · US