Apparatus for determining a characteristic of a fluid having a device configured to measure a hydrodynamic pressure of the fluid
US-10161908-B2 · Dec 25, 2018 · US
Concentration of a compound, e.g. measured by a surface mass change
Concentration of a compound, e.g. measured by a surface mass change · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01N2291/02809 |
| Official title | Concentration of a compound, e.g. measured by a surface mass change |
| Display label | Concentration of a compound, e.g. measured by a surface mass change |
| Total patents | 355 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 21 |
| 2017 | 20 |
| 2018 | 24 |
| 2019 | 28 |
| 2020 | 51 |
| 2021 | 37 |
| 2022 | 41 |
| 2023 | 47 |
| 2024 | 32 |
| 2025 | 35 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Miniaturize particulate matter detector and manufacturing method of a filter
US-10121673-B2 · Nov 6, 2018 · US
Gas detector with normalized response and improved sensitivity
US-2018284012-A1 · Oct 4, 2018 · US
Method for determining concentration and pressure of respective gas of multi-gas
US-2018196015-A1 · Jul 12, 2018 · US
Electrostatically actuated torsional resonant sensors and switches
US-2018149619-A1 · May 31, 2018 · US
Sonoluminescence spectroscopy for real-time downhole fluid analysis
US-9850750-B1 · Dec 26, 2017 · US
Fluid quality sensor and cover assembly
US-2017328745-A1 · Nov 16, 2017 · US
Integrated circuit and manufacturing method
US-9818905-B2 · Nov 14, 2017 · US
Fluid quality sensor and cover assembly
US-9804004-B1 · Oct 31, 2017 · US
Light Emitter Devices, Optical Filter Structures and Methods for Forming Light Emitter Devices and Optical Filter Structures
US-2017290098-A1 · Oct 5, 2017 · US
Resonant CO2 sensing with mitigation of cross-sensitivities
US-9778238-B2 · Oct 3, 2017 · US
Apparatus for Determining a Characteristic of a Fluid
US-2017276646-A1 · Sep 28, 2017 · US
Gas concentration sensors and systems
US-2017261471-A1 · Sep 14, 2017 · US
Method of forming surface acoustic wave tag-based gas sensors
US-2017254780-A1 · Sep 7, 2017 · US
Multi-well quartz crystal microbalance mass and viscoelastic sensor
US-2017241982-A1 · Aug 24, 2017 · US
Method and system for detecting a component in a fluid
US-9739706-B2 · Aug 22, 2017 · US
Gases mixing and measuring for a medical device
US-2017197056-A1 · Jul 13, 2017 · US
Systems and methods for detecting water/product interfaces during food processing
US-9683978-B2 · Jun 20, 2017 · US
Method And Apparatus For Determining A Concentration Of A Constituent Of A Fluid Mixture In A Fluid Chamber
US-2017168019-A1 · Jun 15, 2017 · US
Method for measuring ultrasonically the fill level of a liquid
US-9677924-B2 · Jun 13, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01N2291/02809?
- CPC G01N2291/02809 is the Cooperative Patent Classification code for “Concentration of a compound, e.g. measured by a surface mass change.”
- How many patents are filed under CPC G01N2291/02809 (Concentration of a compound, e.g. measured by a surface mass change)?
- Our database includes 355 publications tagged with this CPC code.
- Is patent activity under CPC G01N2291/02809 growing?
- Publication counts under this code: 32 in 2024 vs 35 in 2025 (latest complete years).