G01F 3/225
Characterised by constructional features of membranes or by means for improving proper
Official title: {characterised by constructional features of membranes or by means for improving proper functioning of membranes (diaphragms for flowmeters in general G01F15/16)}
G01F3/225 (Characterised by constructional features of membranes or by means for improving proper) appears on 14 US grants and 8 published applications in this corpus.
Search patents in G01F- Granted patents
- 14
- Published applications
- 8
- Assignees
- 13
- Inventors
- 31
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas sampling mechanism and gas analysis device having the same6 Oct 2026US 12,754,176 B2Triple Win Technology(Shenzhen) Co. Ltd.
- Online monitoring method for metering performance of diaphragm gas meter9 Mar 2021US 10,942,059 B2Weihai Zhuocheng Gas Safety Device Co., Ltd.
- Gas meter10 Nov 2020US 10,830,624 B2Panasonic Intellectual Property Management Co., Ltd.
- Flow meters, flow meter cartridges, and related methods19 Nov 2019US 10,480,979 B2Agilent Technologies, Inc.
- Gas metering diaphragm31 Jan 2012US 8,104,397 B2M&FC Holding, LLC
- Gas sampling mechanism and gas analysis device having the same15 Feb 2024US 2024/0053315 A1Triple Win Technology(Shenzhen) Co. Ltd.
- Device and method for measuring the flow rate of a liquid24 Dec 2020US 2020/0400475 A1Universite Grenoble Alpes
- Online monitoring method for metering performance of diaphragm gas meter2 Jan 2020US 2020/0003606 A1Weihai Zhuocheng Gas Safety Device Co., Ltd.
- Gas meter7 Feb 2019US 2019/0041250 A1Panasonic Intellectual Property Management Co., Ltd.
- Flow meters, flow meter cartridges, and related methods30 Nov 2017US 2017/0343405 A1Agilent Technologies, Inc.
Most cited
By later US patents
- Fluid flow rate measuring and controlling apparatus and method for using same12US 5,526,685 AGraseby Andersen Inc. · 1996
- Method for making synthetic membranes for a gas meter8US 5,068,074 ASchlumberger Industries · 1991
- Diaphragm type gas meter7US 4,091,668 AAichi Tokei Denki Co., Ltd. · 1978
- Gas meter5US 4,593,562 AFlonic · 1986
- Gas meter including a synthetic membrane4US 4,779,459 AFlonic · 1988