F25J 2270/66
Closed external refrigeration cycle with multi component refrigerant [mcr]
Official title: Closed external refrigeration cycle with multi component refrigerant [MCR], e.g. mixture of hydrocarbons
F25J2270/66 (Closed external refrigeration cycle with multi component refrigerant [mcr]) appears on 186 US grants and 195 published applications in this corpus.
Search patents in F25J- Granted patents
- 186
- Published applications
- 195
- Assignees
- 81
- Inventors
- 334
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 12 | 2 |
| 2002 | 7 | 2 |
| 2003 | 5 | 5 |
| 2004 | 4 | 6 |
| 2005 | 2 | 5 |
| 2006 | 4 | 3 |
| 2007 | 4 | 4 |
| 2008 | 0 | 3 |
| 2009 | 3 | 3 |
| 2010 | 1 | 6 |
| 2011 | 0 | 8 |
| 2012 | 0 | 8 |
| 2013 | 1 | 7 |
| 2014 | 1 | 3 |
| 2015 | 0 | 10 |
| 2016 | 4 | 6 |
| 2017 | 7 | 15 |
| 2018 | 5 | 9 |
| 2019 | 13 | 21 |
| 2020 | 7 | 7 |
| 2021 | 3 | 11 |
| 2022 | 16 | 14 |
| 2023 | 16 | 14 |
| 2024 | 11 | 12 |
| 2025 | 6 | 1 |
| 2026 | 6 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for co-production of a densified liquid oxygen product and densified liquid methane product15 Sep 2026US 12,736,280 B2Praxair Technology, Inc.
- Process for separating hydrogen from an olefin hydrocarbon effluent vapor stream2 Jun 2026US 12,643,067 B2Enflex, Inc.
- Dehydrogenation and pyrolysis product recovery with a common refrigerant2 Jun 2026US 12,643,843 B2Uop LLC
- Separation of hydrogen, methane, ethane, and propane in naphtha to ethane and propane fractionation section based on a dividing wall fractionation column integration12 May 2026US 12,623,980 B2Uop LLC
- Ethane separation with overhead cryogenic heat exchanger28 Apr 2026US 12,613,065 B2Uop LLC
- Cascade refrigeration natural gas liquefaction system and process27 Aug 2026US 2026/0251385 A1Hangzhou Zhongtai Cryogenic Technology Corporation
- Carbon dioxide separation plant using external refrigeration circuit, and method13 Aug 2026US 2026/0235355 A1Nuovo Pignone Tecnologie Srl
- Coil wound heat exchanger6 Aug 2026US 2026/0227122 A1Honeywell Lng LLC
- Energy efficient non-flammable refrigeration for co2-rich process streams25 Jun 2026US 2026/0177314 A1Uop LLC
- Nitrogen Rejection Unit with Mixed Refrigerant Cooling System and Method28 May 2026US 2026/0146785 A1
Most cited
By later US patents
- Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants112US 6,401,486 B12002
- Integrated high pressure NGL recovery in the production of liquefied natural gas94US 6,662,589 B1Air Products and Chemicals, Inc. · 2003
- Process of fractionating gas feeds and apparatus for carrying out the said process85US 4,689,063 ACompagnie Francaise d'Etudes et de Construction "Technip" · 1987
- Method and apparatus for removing pollutants from flue gas84US 5,467,722 A1995
- System and process for liquefying high pressure natural gas73US 6,367,286 B1Black & Veatch Pritchard, Inc. · 2002