G01N 30/46
Using more than one column
Official title: using more than one column {(G01N30/44 takes precedence)}
G01N30/46 (Using more than one column) appears on 907 US grants and 967 published applications in this corpus.
Search patents in G01N- Granted patents
- 907
- Published applications
- 967
- Assignees
- 460
- Inventors
- 1,893
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 5 | 0 |
| 1991 | 11 | 0 |
| 1992 | 18 | 0 |
| 1993 | 16 | 0 |
| 1994 | 14 | 0 |
| 1995 | 14 | 0 |
| 1996 | 13 | 0 |
| 1997 | 8 | 0 |
| 1998 | 8 | 0 |
| 1999 | 11 | 0 |
| 2000 | 16 | 0 |
| 2001 | 22 | 12 |
| 2002 | 37 | 46 |
| 2003 | 32 | 43 |
| 2004 | 36 | 49 |
| 2005 | 23 | 48 |
| 2006 | 18 | 35 |
| 2007 | 24 | 38 |
| 2008 | 18 | 35 |
| 2009 | 25 | 39 |
| 2010 | 28 | 30 |
| 2011 | 14 | 34 |
| 2012 | 33 | 27 |
| 2013 | 18 | 35 |
| 2014 | 25 | 34 |
| 2015 | 23 | 31 |
| 2016 | 17 | 38 |
| 2017 | 25 | 45 |
| 2018 | 21 | 38 |
| 2019 | 45 | 49 |
| 2020 | 37 | 36 |
| 2021 | 30 | 52 |
| 2022 | 27 | 48 |
| 2023 | 39 | 45 |
| 2024 | 40 | 23 |
| 2025 | 38 | 33 |
| 2026 | 23 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Analyzer and control method for locking analyzer columns29 Sep 2026US 12,748,085 B2Hitachi High-Tech Corporation
- Preparative system15 Sep 2026US 12,736,507 B2Shimadzu Corporation
- Thermal modulator8 Sep 2026US 12,730,095 B2Leco Corporation
- Gas analysis system1 Sep 2026US 12,724,010 B2Shimadzu Corporation
- Method for detecting urinary tract infections and sample analysis using liquid chromatography1 Sep 2026US 12,724,025 B2
- Propane-position carbon isotope testing method and testing system8 Oct 2026US 2026/0309682 A1China Petroleum & Chemical Corporation
- Analysis system, control method thereof, and recording medium24 Sep 2026US 2026/0287563 A1Shimadzu Corporation
- Liquid chromatograph system and control method24 Sep 2026US 2026/0287564 A1Shimadzu Corporation
- Flow-restricted pneumatic modulator for a multidimensional gas chromatography system27 Aug 2026US 2026/0251624 A1The Regents of the University of Michigan
- Connection Device for a Separation System such as a Chromatography System20 Aug 2026US 2026/0241308 A1Cytiva Sweden AB
Most cited
By later US patents
- Microscale fluid handling system662US 5,872,010 ANortheastern University · 1999
- Flow-injection analysis and variable-flow light-scattering methods and apparatus for characterizing polymers317US 6,175,409 B1Symyx Technologies, Inc. · 2001
- Capillary electroflow apparatus and method304US 6,103,199 AAclara Biosciences, Inc. · 2000
- Apparatus for assay, synthesis and storage, and methods of manufacture, use, and manipulation thereof281US 6,716,629 B2BioTrove, Inc. · 2004
- Sensor devices234US 5,194,133 AGeneral Electric Company · 1993