Synchronised variation of source conditions of an atmospheric pressure chemical ionisation mass spectrometer coupled to a gas chromatograph to improve stability during analysis
US-10141172-B2 · Nov 27, 2018 · US
field ionisation, e.g. corona discharge (atmospheric pressure corona discharge per se H01T19/00)
field ionisation, e.g. corona discharge (atmospheric pressure corona discharge per se H01T19/00) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01J49/168 |
| Official title | {field ionisation, e.g. corona discharge (atmospheric pressure corona discharge per se H01T19/00)} |
| Display label | field ionisation, e.g. corona discharge (atmospheric pressure corona discharge per se H01T19/00) |
| Total patents | 180 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 20 |
| 2016 | 20 |
| 2017 | 14 |
| 2018 | 11 |
| 2019 | 14 |
| 2020 | 19 |
| 2021 | 27 |
| 2022 | 19 |
| 2023 | 16 |
| 2024 | 8 |
| 2025 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ion generation using modified wetted porous materials
US-10088461-B2 · Oct 2, 2018 · US
Atmospheric-pressure ionization and fragmentation of molecules for structural elucidation
US-2018247804-A1 · Aug 30, 2018 · US
Ion mobility spectrometer
US-2018182606-A1 · Jun 28, 2018 · US
Device and method for analysis of biofluids by ion generation using wetted porous material
US-2018033600-A1 · Feb 1, 2018 · US
Mass spectrometric determination of eicosapentaenoic acid and docosahexaenoic acid
US-2018024151-A1 · Jan 25, 2018 · US
Hybrid ion source, mass spectrometer, and ion mobility device
US-9852897-B2 · Dec 26, 2017 · US
Methods of analyzing crude oil
US-2017343526-A1 · Nov 30, 2017 · US
Ion generation using modified wetted porous materials
US-9797872-B2 · Oct 24, 2017 · US
Methods of analyzing crude oil
US-9733228-B2 · Aug 15, 2017 · US
Hybrid ion source and mass spectrometric device
US-9704699-B2 · Jul 11, 2017 · US
Mass spectrometric determination of eicosapentaenoic acid and docosahexaenoic acid
US-9696325-B2 · Jul 4, 2017 · US
Ionizer and mass spectrometer including first section for ionizing sample under atmospheric pressure while vaporizing or desorbing the sample component and second section for generating corona discharge
US-9691598-B2 · Jun 27, 2017 · US
Ion generation using modified wetted porous materials
US-2017168032-A1 · Jun 15, 2017 · US
Synchronised Variation of Source Conditions of an Atmospheric Pressure Chemical Ionisation Mass Spectrometer Coupled to a Gas Chromatograph to Improve Stability During Analysis
US-2017110310-A1 · Apr 20, 2017 · US
Non-radioactive, capacitive discharge plasma ion source and method
US-9607819-B1 · Mar 28, 2017 · US
Method and system of atmospheric pressure megavolt electrostatic field ionization desorption (apme-fid)
US-2017084442-A1 · Mar 23, 2017 · US
Glow Discharge Ion Source
US-2017069478-A1 · Mar 9, 2017 · US
Sample droplet generation from segmented fluid flow and related devices and methods
US-9543137-B2 · Jan 10, 2017 · US
Mass spectrometer and mass analyzing method for efficiently ionizing a sample with less carry-over
US-9543135-B2 · Jan 10, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01J49/168?
- CPC H01J49/168 is the Cooperative Patent Classification code for “field ionisation, e.g. corona discharge (atmospheric pressure corona discharge per se H01T19/00).”
- How many patents are filed under CPC H01J49/168 (field ionisation, e.g. corona discharge (atmospheric pressure corona discharge per se H01T19/00))?
- Our database includes 180 publications tagged with this CPC code.
- Is patent activity under CPC H01J49/168 growing?
- Publication counts under this code: 8 in 2024 vs 12 in 2025 (latest complete years).