Multi-column gas chromatography for analysis of a formation sample
US-12480930-B2 · Nov 25, 2025 · US
using recycling of the fraction to be distributed
using recycling of the fraction to be distributed · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01N30/44 |
| Official title | using recycling of the fraction to be distributed |
| Display label | using recycling of the fraction to be distributed |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 3 |
| 2019 | 3 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 4 |
| 2023 | 8 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Management system for managing operation of preparative liquid chromatograph apparatus
US-12326426-B2 · Jun 10, 2025 · US
Simulated moving-bed type chromatographic separation method and simulated moving-bed type chromatographic separation system
US-2025099872-A1 · Mar 27, 2025 · US
Automated semi-preparative gradient recycling liquid chromatography
US-12078621-B2 · Sep 3, 2024 · US
Multi-column gas chromatography for analysis of a formation sample
US-2024175858-A1 · May 30, 2024 · US
Simulated moving-bed type chromatographic separation method and simulated moving-bed type chromatographic separation system
US-11839835-B2 · Dec 12, 2023 · US
Chromatography Apparatus
US-2023349867-A1 · Nov 2, 2023 · US
Chromatograph, and sample analysis method
US-2023324347-A1 · Oct 12, 2023 · US
Management system for managing operation of preparative liquid chromatograph apparatus
US-2023288385-A1 · Sep 14, 2023 · US
Chromatography apparatus
US-11740210-B2 · Aug 29, 2023 · US
Preparative liquid chromatography system
US-11630088-B2 · Apr 18, 2023 · US
Sample dispatching with fluidic sample retaining
US-11630090-B2 · Apr 18, 2023 · US
Check standard recycle setup for ion chromatography
US-2023075933-A1 · Mar 9, 2023 · US
Automated semi-preparative gradient recycling liquid chromatography
US-2022308020-A1 · Sep 29, 2022 · US
Gas chromatograph-ion mobility spectrometry combined equipment
US-11320407-B2 · May 3, 2022 · US
High resolution and semi-preparative recycling chromatography system for isolation and preparation of unknown trace impurities in pharmaceutical products
US-11285403-B2 · Mar 29, 2022 · US
Simulated moving-bed type chromatographic separation method and simulated moving-bed type chromatographic separation system
US-2022032208-A1 · Feb 3, 2022 · US
Purity detection of separated sample portion as basis for a positive or negative decision concerning further separation
US-2021387192-A1 · Dec 16, 2021 · US
Device and method for the selective fractionation of ultrafine particles
US-11185870-B2 · Nov 30, 2021 · US
Preparative liquid chromatography system
US-2021310997-A1 · Oct 7, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01N30/44?
- CPC G01N30/44 is the Cooperative Patent Classification code for “using recycling of the fraction to be distributed.”
- How many patents are filed under CPC G01N30/44 (using recycling of the fraction to be distributed)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC G01N30/44 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).