G01N 2030/385
By switching valves
Official title: {by switching valves}
G01N2030/385 (By switching valves) appears on 60 US grants and 53 published applications in this corpus.
Search patents in G01N- Granted patents
- 60
- Published applications
- 53
- Assignees
- 37
- Inventors
- 141
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 4 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 3 |
| 2016 | 2 | 1 |
| 2017 | 2 | 0 |
| 2018 | 1 | 4 |
| 2019 | 3 | 1 |
| 2020 | 2 | 6 |
| 2021 | 2 | 9 |
| 2022 | 6 | 5 |
| 2023 | 6 | 8 |
| 2024 | 5 | 2 |
| 2025 | 6 | 1 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Monitoring analysis device and monitoring analysis method6 Oct 2026US 12,754,173 B2Shimadzu Corporation
- Automatic analyzer including HPLC and control method for the same21 Jul 2026US 12,687,528 B2Hitachi High-Tech Corporation
- Preparative separation and purification device and preparative separation and purification method31 Mar 2026US 12,590,933 B2Shimadzu Corporation
- State determination of a fluidic system12 Aug 2025US 12,385,885 B2Dionex Softron GmbH
- Liquid chromatograph15 Jul 2025US 12,360,088 B2Shimadzu Corporation
- Systems and methods for sample analysis21 May 2026US 2026/0140095 A1Agilent Technologies, Inc.
- State determination of a fluidic system1 Jan 2026US 2026/0002916 A1Dionex Softron GmbH
- Fractionating Liquid Chromatograph and Control Method Therefor6 Feb 2025US 2025/0041761 A1Shimadzu Corporation
- Liquid Chromatograph and Liquid Delivery Method27 Jun 2024US 2024/0210364 A1Hitachi High-Tech Corporation
- Automatic analyzer including hplc and control method for the same13 Jun 2024US 2024/0192180 A1Hitachi High-Tech Corporation
Most cited
By later US patents
- Liquid chromatograph144US 5,132,012 AHitachi, Ltd. · 1992
- Miniature devices useful for gas chromatography78US 4,935,040 AThe Perkin-Elmer Corporation · 1990
- Protein chromatography system56US 6,344,172 B12002
- Mechanical gas chromatography injection valves and column multiplexing techniques37US 5,205,845 AThe Regents of the University of Michigan · 1993
- Syringe drive with lead screw mechanism37US 5,238,654 ASpectra-Physics Analytical, Inc. · 1993