Multi-sensor optical device for detecting chemical species and manufacturing method thereof
US-10483298-B2 · Nov 19, 2019 · US
Gaseous flow
Gaseous flow · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01N2021/8578 |
| Official title | {Gaseous flow} |
| Display label | Gaseous flow |
| Total patents | 182 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 13 |
| 2017 | 12 |
| 2018 | 15 |
| 2019 | 27 |
| 2020 | 16 |
| 2021 | 17 |
| 2022 | 28 |
| 2023 | 14 |
| 2024 | 16 |
| 2025 | 14 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Laser gas analyzer
US-2019346366-A1 · Nov 14, 2019 · US
Gas analyzer
US-2019331595-A1 · Oct 31, 2019 · US
Gas analyzer
US-2019317018-A1 · Oct 17, 2019 · US
Portable multi-spectrometry system for chemical and biological sensing in atmospheric air
US-2019301931-A1 · Oct 3, 2019 · US
Spectroscopic analysis apparatus
US-2019257749-A1 · Aug 22, 2019 · US
Optical particle sensor and sensing method
US-10365197-B2 · Jul 30, 2019 · US
Air quality measuring apparatus
US-2019178862-A1 · Jun 13, 2019 · US
Gas analyzer
US-10288561-B1 · May 14, 2019 · US
Gas concentration measuring device
US-2019094148-A1 · Mar 28, 2019 · US
Method for in-line quantitative analysis of a stream in a production plant for the synthesis of urea
US-10209191-B2 · Feb 19, 2019 · US
Measurement device for measuring fine particulate matter in at least one volume of air for a vehicle, particularly for a motor vehicle
US-2019033224-A1 · Jan 31, 2019 · US
Leaked gas detection device and leaked gas detection method
US-10190975-B2 · Jan 29, 2019 · US
N2O analysis device and analysis method
US-10156517-B2 · Dec 18, 2018 · US
Gas control system and program for gas control system
US-10138555-B2 · Nov 27, 2018 · US
Leaked Gas Detection Device And Leaked Gas Detection Method
US-2018321141-A1 · Nov 8, 2018 · US
System and method for monitoring composition in a sidestream system using a disposable sampling chamber
US-10094810-B2 · Oct 9, 2018 · US
Gas concentration estimation device
US-10078053-B2 · Sep 18, 2018 · US
Systems and methods for chamberless smoke detection and indoor air quality monitoring
US-2018252654-A1 · Sep 6, 2018 · US
Optical particle sensor and sensing method
US-2018217042-A1 · Aug 2, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01N2021/8578?
- CPC G01N2021/8578 is the Cooperative Patent Classification code for “Gaseous flow.”
- How many patents are filed under CPC G01N2021/8578 (Gaseous flow)?
- Our database includes 182 publications tagged with this CPC code.
- Is patent activity under CPC G01N2021/8578 growing?
- Publication counts under this code: 16 in 2024 vs 14 in 2025 (latest complete years).