G01N 2030/328
Valves
Official title: {valves, e.g. check valves of pumps}
G01N2030/328 (Valves) appears on 179 US grants and 202 published applications in this corpus.
Search patents in G01N- Granted patents
- 179
- Published applications
- 202
- Assignees
- 91
- Inventors
- 391
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 2 |
| 2010 | 2 | 3 |
| 2011 | 0 | 3 |
| 2012 | 2 | 2 |
| 2013 | 3 | 4 |
| 2014 | 4 | 4 |
| 2015 | 1 | 13 |
| 2016 | 6 | 10 |
| 2017 | 7 | 5 |
| 2018 | 6 | 8 |
| 2019 | 10 | 17 |
| 2020 | 8 | 17 |
| 2021 | 10 | 19 |
| 2022 | 17 | 21 |
| 2023 | 15 | 17 |
| 2024 | 21 | 13 |
| 2025 | 16 | 20 |
| 2026 | 11 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flow module selector29 Sep 2026US 12,748,083 B2Dh Co., Ltd.
- Analysis system and method for impurity components in perfluoropropane22 Sep 2026US 12,742,752 B2Lansis Instrument (Shanghai) Co., Ltd
- Gas analysis system1 Sep 2026US 12,724,010 B2Shimadzu Corporation
- Systems and methods for injection monitoring and diagnostics for gas chromatography18 Aug 2026US 12,710,408 B2Thermo Finnigan LLC
- Pump unit for chromatograph11 Aug 2026US 12,704,486 B2Shimadzu Corporation
- Digital gas assist with flow control and gauge8 Oct 2026US 2026/0310242 A1Dionex Corporation
- Dac apparatus24 Sep 2026US 2026/0287562 A1Honda Motor Co., Ltd.
- Modular liquid chromatography pump system17 Sep 2026US 2026/0276605 A1Micromics Technologies LLC
- Defective point estimation method and liquid chromatograph20 Aug 2026US 2026/0243738 A1Hitachi High-Tech Corporation
- Analysis system and method for impurity components in perfluoropropane23 Jul 2026US 2026/0210916 A1Lansis Instrument (Shanghai) Co., Ltd
Most cited
By later US patents
- Method and apparatus for sample analysis143US 6,865,926 B2State of Oregon acting by and through the State Board of Higher Education on behalf of Portland State University · 2005
- Multichannel pump apparatus with microflow rate capability89US 5,253,981 A1993
- Fluid delivery system with deficit flow compensation78US 4,919,595 ABeckman Instruments, Inc. · 1990
- Multichannel pump apparatus with microflow rate capability71US 5,630,706 A1997
- Mixing apparatus for microflow gradient pumping55US 5,664,938 A1997