F25J 3/04769
Operation, control and regulation of the process
Official title: {Operation, control and regulation of the process; Instrumentation within the process}
F25J3/04769 (Operation, control and regulation of the process) appears on 444 US grants and 412 published applications in this corpus.
Search patents in F25J- Granted patents
- 444
- Published applications
- 412
- Assignees
- 98
- Inventors
- 670
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 11 | 0 |
| 1995 | 10 | 0 |
| 1996 | 12 | 0 |
| 1997 | 17 | 0 |
| 1998 | 11 | 0 |
| 1999 | 18 | 0 |
| 2000 | 17 | 0 |
| 2001 | 14 | 3 |
| 2002 | 15 | 16 |
| 2003 | 16 | 9 |
| 2004 | 7 | 12 |
| 2005 | 10 | 5 |
| 2006 | 6 | 13 |
| 2007 | 7 | 11 |
| 2008 | 7 | 9 |
| 2009 | 6 | 14 |
| 2010 | 6 | 11 |
| 2011 | 6 | 21 |
| 2012 | 1 | 15 |
| 2013 | 6 | 14 |
| 2014 | 9 | 15 |
| 2015 | 11 | 15 |
| 2016 | 12 | 27 |
| 2017 | 16 | 18 |
| 2018 | 13 | 19 |
| 2019 | 26 | 31 |
| 2020 | 15 | 17 |
| 2021 | 15 | 22 |
| 2022 | 16 | 25 |
| 2023 | 12 | 21 |
| 2024 | 16 | 20 |
| 2025 | 17 | 15 |
| 2026 | 10 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for configuring a control system for a process plant29 Sep 2026US 12,747,912 B2Linde Aktiengesellschaft
- Dual temperature liquid oxygen subcooling in an air separation unit22 Sep 2026US 12,742,591 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column15 Sep 2026US 12,736,282 B2Praxair Technology, Inc.
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions25 Aug 2026US 12,716,650 B2Saipem S.P.A.
- Method and plant for low temperature fractionation of air18 Aug 2026US 12,710,228 B2Linde Aktiengesellschaft
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Process and apparatus for intermittent liquefaction operation that can support continuous air separation processing6 Aug 2026US 2026/0227123 A1Air Products and Chemicals, Inc.
- Process and apparatus for producing argon by cryogenic air separation23 Jul 2026US 2026/0210624 A1
- Method for cryogenic separation of air, and air separation plant16 Jul 2026US 2026/0202125 A1Linde Aktiengesellschaft
- Apparatus and method for maintaining or increasing liquid production of an air separation unit9 Jul 2026US 2026/0194295 A1Air Liquide Large Industries U.S. LP
Most cited
By later US patents
- Clean air engines transportation and other power applications153US 5,680,764 AClean Energy Systems, Inc. · 1997
- Statistical process control for air separation process99US 5,257,206 APraxair Technology, Inc. · 1993
- Process and device for cooling a gas by direct heat exchange with a cooling liquid97US 7,536,873 B2Linde Aktiengesellschaft · 2009
- Air separation process and system utilizing pressure-swing driers95US 3,967,464 AAir Products and Chemicals, Inc. · 1976
- Turbine/motor (generator) driven booster compressor74US 5,924,307 APraxair Technology, Inc. · 1999