G05D 11/00
Control of flow ratio
Official title: Control of flow ratio (control of chemical or physico-chemical variables, e.g. pH-value, G05D21/00; control of humidity G05D22/00; control of temperature by varying the mixing ratio of two fluids having different temperatures G05D23/13; control of viscosity G05D24/00)
G05D11/00 (Control of flow ratio) appears on 1,552 US grants and 1,241 published applications in this corpus.
Search patents in G05D- Granted patents
- 1,552
- Published applications
- 1,241
- Assignees
- 910
- Inventors
- 3,229
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 34 | 0 |
| 1978 | 23 | 0 |
| 1979 | 26 | 0 |
| 1980 | 26 | 0 |
| 1981 | 18 | 0 |
| 1982 | 26 | 0 |
| 1983 | 18 | 0 |
| 1984 | 11 | 0 |
| 1985 | 19 | 0 |
| 1986 | 19 | 0 |
| 1987 | 25 | 0 |
| 1988 | 21 | 0 |
| 1989 | 24 | 0 |
| 1990 | 17 | 0 |
| 1991 | 26 | 0 |
| 1992 | 25 | 0 |
| 1993 | 22 | 0 |
| 1994 | 31 | 0 |
| 1995 | 19 | 0 |
| 1996 | 23 | 0 |
| 1997 | 22 | 0 |
| 1998 | 18 | 0 |
| 1999 | 38 | 0 |
| 2000 | 25 | 0 |
| 2001 | 28 | 6 |
| 2002 | 27 | 30 |
| 2003 | 22 | 26 |
| 2004 | 31 | 41 |
| 2005 | 17 | 39 |
| 2006 | 20 | 51 |
| 2007 | 20 | 47 |
| 2008 | 29 | 42 |
| 2009 | 30 | 41 |
| 2010 | 23 | 48 |
| 2011 | 21 | 35 |
| 2012 | 27 | 52 |
| 2013 | 32 | 71 |
| 2014 | 29 | 44 |
| 2015 | 44 | 53 |
| 2016 | 50 | 74 |
| 2017 | 53 | 51 |
| 2018 | 50 | 64 |
| 2019 | 65 | 62 |
| 2020 | 62 | 60 |
| 2021 | 55 | 69 |
| 2022 | 48 | 54 |
| 2023 | 56 | 57 |
| 2024 | 58 | 55 |
| 2025 | 48 | 40 |
| 2026 | 28 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G05D 11/02Controlling ratio of two or more flows of fluid or fluent material1,293
- G05D 11/006Involving a first fluid acting on the feeding of a second fluid100
- G05D 11/003Control of flow ratio: using interconnected flow control elements58
- G05D 11/008Involving a fluid operating a pump motor49
- G05D 11/16Controlling mixing ratio of fluids having different temperatures47
- G05D 11/001Control of flow ratio: with discontinuous action30
- G05D 11/005Control of flow ratio: using synchronised pumps24
Recent patents
- Process control for a carbon capture use and storage pipeline using spectroscopy1 Sep 2026US 12,724,434 B2Halliburton Energy Services.Inc.
- Water mixing device and water purifier including the same1 Sep 2026US 12,724,435 B2Coway Co., Ltd.
- Supply device and process for supplying a patient-side coupling unit with a gas mixture11 Aug 2026US 12,702,783 B2Drägerwerk AG & Co. KGaA
- Installation and method for distributing a gas mixture11 Aug 2026US 12,702,960 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Methods and assemblies for gas flow ratio control11 Aug 2026US 12,707,921 B2APPLIED Materials.Inc.
- Touchless Faucet with Integrated Flosser8 Oct 2026US 2026/0308895 A1
- Process and system for generation of coke drum outage projections8 Oct 2026US 2026/0310246 A1
- System and method for enhanced oil recovery utilizing alternating stacked liquid and gas slugs17 Sep 2026US 2026/0275841 A1Eor Etc LLC
- Manual and sensor integrated kitchen faucet and control method thereof13 Aug 2026US 2026/0234918 A1Ningbo Geagle Intelligent Kitchen & Bath Tech Co., Ltd
- Method and apparatus for corrosion mitigation in wet pipes30 Jul 2026US 2026/0218837 A1General Air Products, Inc.
Most cited
By later US patents
- Gas-line system for semiconductor-manufacturing apparatus492US 6,662,817 B2ASM Japan K .K. · 2003
- Apparatus for the monitored metering of no into patients' respiratory air487US 5,531,218 AMesser Griesheim GmbH · 1996
- Pressure flow and concentration control of oxygen/ozone gas mixtures450US 5,904,170 AAPPLIED Materials.Inc. · 1999
- Controlled additive metering system248US 4,265,266 AHalliburton Company · 1981
- Fluid metering and mixing device having inlet and outlet valves184US 4,161,264 A1979