F25J 3/0204
Characterised by the feed stream
Official title: {characterised by the feed stream (for air F25J3/04)}
F25J3/0204 (Characterised by the feed stream) appears on 1,294 US grants and 1,227 published applications in this corpus.
Search patents in F25J- Granted patents
- 1,294
- Published applications
- 1,227
- Assignees
- 359
- Inventors
- 1,784
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 9 | 0 |
| 1978 | 12 | 0 |
| 1979 | 14 | 0 |
| 1980 | 13 | 0 |
| 1981 | 18 | 0 |
| 1982 | 19 | 0 |
| 1983 | 8 | 0 |
| 1984 | 25 | 0 |
| 1985 | 28 | 0 |
| 1986 | 21 | 0 |
| 1987 | 33 | 0 |
| 1988 | 30 | 0 |
| 1989 | 13 | 0 |
| 1990 | 15 | 0 |
| 1991 | 12 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 17 | 0 |
| 1995 | 15 | 0 |
| 1996 | 20 | 0 |
| 1997 | 28 | 0 |
| 1998 | 22 | 0 |
| 1999 | 26 | 0 |
| 2000 | 25 | 0 |
| 2001 | 34 | 4 |
| 2002 | 20 | 23 |
| 2003 | 28 | 20 |
| 2004 | 16 | 29 |
| 2005 | 15 | 36 |
| 2006 | 21 | 42 |
| 2007 | 29 | 30 |
| 2008 | 22 | 52 |
| 2009 | 21 | 51 |
| 2010 | 14 | 68 |
| 2011 | 15 | 56 |
| 2012 | 22 | 64 |
| 2013 | 32 | 43 |
| 2014 | 26 | 42 |
| 2015 | 34 | 69 |
| 2016 | 33 | 52 |
| 2017 | 52 | 73 |
| 2018 | 58 | 66 |
| 2019 | 65 | 79 |
| 2020 | 54 | 68 |
| 2021 | 53 | 69 |
| 2022 | 51 | 48 |
| 2023 | 44 | 42 |
| 2024 | 36 | 44 |
| 2025 | 32 | 30 |
| 2026 | 20 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for generating refrigeration for a carbon monoxide cold box15 Sep 2026US 12,736,281 B2Praxair Technology, Inc.
- Method and system for producing a liquefied natural gas product18 Aug 2026US 12,710,225 B2Linde Aktiengesellschaft
- Apparatus and process for removal of heavy hydrocarbons from a feed gas11 Aug 2026US 12,703,831 B2Honeywell Lng LLC
- System for purifying helium gas, method, and application28 Jul 2026US 12,693,071 B2Changqing Engineering Design Co., Ltd.
- Distillation column minimum flow arrangement14 Jul 2026US 12,678,708 B2Saudi Arabian Oil Company
- Method for liquefying carbon dioxide1 Oct 2026US 2026/0298531 A1
- Cryogenic process for helium recovery from low helium-containing gas stream24 Sep 2026US 2026/0287252 A1Council of Scientific and Industrial Research
- Method and plant for separation of carbon dioxide (co2)27 Aug 2026US 2026/0251390 A1Aker Carbon Capture Norway AS
- Single Column Nitrogen Rejection Unit20 Aug 2026US 2026/0243507 A1Chart Energy & Chemicals, Inc.
- Method for separating nitrogen from lng13 Aug 2026US 2026/0235353 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Low pressure process for C.sub.3.sup.+ liquids recovery from process product gas213US 4,734,115 AAir Products and Chemicals, Inc. · 1988
- Methanol plant retrofit for acetic acid manufacture208US 6,232,352 B1Acetex limited · 2001
- Carbon dioxide recovery156US 4,762,543 AAmoco Corporation · 1988
- Process for liquefaction of natural gas137US 6,023,942 AExxon Production Research Company · 2000
- Hydrocarbon gas processing136US 4,140,504 AThe Ortloff Corporation · 1979