G01N 30/461
With serial coupling of separation columns
Official title: {with serial coupling of separation columns}
G01N30/461 (With serial coupling of separation columns) appears on 547 US grants and 578 published applications in this corpus.
Search patents in G01N- Granted patents
- 547
- Published applications
- 578
- Assignees
- 295
- Inventors
- 1,186
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 16 | 0 |
| 1993 | 12 | 0 |
| 1994 | 12 | 0 |
| 1995 | 8 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 10 | 7 |
| 2002 | 18 | 20 |
| 2003 | 13 | 20 |
| 2004 | 19 | 27 |
| 2005 | 14 | 25 |
| 2006 | 10 | 22 |
| 2007 | 10 | 28 |
| 2008 | 9 | 25 |
| 2009 | 13 | 19 |
| 2010 | 22 | 21 |
| 2011 | 11 | 26 |
| 2012 | 27 | 18 |
| 2013 | 12 | 30 |
| 2014 | 18 | 25 |
| 2015 | 19 | 22 |
| 2016 | 14 | 23 |
| 2017 | 14 | 32 |
| 2018 | 14 | 23 |
| 2019 | 27 | 34 |
| 2020 | 27 | 21 |
| 2021 | 23 | 31 |
| 2022 | 15 | 20 |
| 2023 | 20 | 19 |
| 2024 | 20 | 11 |
| 2025 | 15 | 20 |
| 2026 | 9 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Thermal modulator8 Sep 2026US 12,730,095 B2Leco Corporation
- Continuous liquid-liquid chromatographic separation of chemical species using multiple liquid phases and related systems and articles18 Aug 2026US 12,708,864 B2Zaiput Flow Technologies LLC
- Fluidic configuration for a multidimensional liquid chromatography system16 Jun 2026US 12,656,323 B2Waters Technologies Corporation
- Systems and methods for two-dimensional liquid chromatography using size exclusion chromatography as a first dimension19 May 2026US 12,631,603 B2Waters Technologies Corporation
- Fluid separation with sampling unit selectively coupling upstream and downstream of separation unit31 Mar 2026US 12,589,329 B2Agilent Technologies, Inc.
- Flow-restricted pneumatic modulator for a multidimensional gas chromatography system27 Aug 2026US 2026/0251624 A1The Regents of the University of Michigan
- Real-time identification and analysis of chemical mixtures20 Aug 2026US 2026/0245672 A1Novateur Research Solutions
- Rig site chromatographic column reconditioning30 Jul 2026US 2026/0219240 A1Schlumberger Technology Corporation
- Split Flow Modulator for Comprehensive Two-Dimensional Chromatography7 May 2026US 2026/0126418 A1Leco Corporation
- Gas chromatography instrument for determining a concentration of a volatile marker7 May 2026US 2026/0126419 A1Koninklijke Philips N. V.
Most cited
By later US patents
- Flow-injection analysis and variable-flow light-scattering methods and apparatus for characterizing polymers317US 6,175,409 B1Symyx Technologies, Inc. · 2001
- Use of retentate chromatography to generate difference maps229US 6,225,047 B1Ciphergen Biosystems, Inc. · 2001
- High-temperature characterization of polymers181US 6,260,407 B1Symyx Technologies, Inc. · 2001
- On-line DNA analysis system with rapid thermal cycling121US 5,935,522 AUniversity of Utah Research Foundation · 1999
- Rapid characterization of polymers120US 6,406,632 B1Symyx Technologies, Inc. · 2002