F25J 2220/00
Processes or apparatus involving steps for the removal of impurities
F25J2220/00 (Processes or apparatus involving steps for the removal of impurities) appears on 1,087 US grants and 1,298 published applications in this corpus.
Search patents in F25J- Granted patents
- 1,087
- Published applications
- 1,298
- Assignees
- 418
- Inventors
- 1,975
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 10 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 10 | 0 |
| 1982 | 10 | 0 |
| 1983 | 9 | 0 |
| 1984 | 17 | 0 |
| 1985 | 16 | 0 |
| 1986 | 10 | 0 |
| 1987 | 11 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 15 | 0 |
| 1991 | 7 | 0 |
| 1992 | 12 | 0 |
| 1993 | 7 | 0 |
| 1994 | 19 | 0 |
| 1995 | 14 | 0 |
| 1996 | 15 | 0 |
| 1997 | 18 | 0 |
| 1998 | 15 | 0 |
| 1999 | 15 | 0 |
| 2000 | 20 | 0 |
| 2001 | 26 | 4 |
| 2002 | 17 | 12 |
| 2003 | 15 | 15 |
| 2004 | 18 | 24 |
| 2005 | 15 | 16 |
| 2006 | 11 | 33 |
| 2007 | 19 | 21 |
| 2008 | 14 | 37 |
| 2009 | 18 | 49 |
| 2010 | 11 | 71 |
| 2011 | 14 | 48 |
| 2012 | 17 | 63 |
| 2013 | 26 | 65 |
| 2014 | 21 | 52 |
| 2015 | 29 | 71 |
| 2016 | 33 | 57 |
| 2017 | 57 | 91 |
| 2018 | 55 | 80 |
| 2019 | 54 | 78 |
| 2020 | 61 | 67 |
| 2021 | 50 | 51 |
| 2022 | 59 | 65 |
| 2023 | 44 | 65 |
| 2024 | 52 | 73 |
| 2025 | 34 | 54 |
| 2026 | 29 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25J 2220/60Separating impurities from natural gasIndexing code680
- F25J 2220/80Separating impurities from carbon dioxideIndexing code224
- F25J 2220/02Separating impurities in general from the feed streamIndexing code79
- F25J 2220/40Separating high boiling, i.e. less volatile components from airIndexing code47
- F25J 2220/44Separating high boiling, i.e. less volatile components from nitrogenIndexing code44
- F25J 2220/42Separating low boiling, i.e. more volatile components from nitrogenIndexing code34
- F25J 2220/50Separating low boiling, i.e. more volatile components from oxygenIndexing code33
- F25J 2220/52Separating high boiling, i.e. less volatile components from oxygenIndexing code29
Recent patents
- Closed loop LNG process for a feed gas with nitrogen22 Sep 2026US 12,742,589 B2ConocoPhillips Company
- Method and system for separating a gas mixture25 Aug 2026US 12,714,965 B2Linde Aktiengesellschaft
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions25 Aug 2026US 12,716,650 B2Saipem S.P.A.
- Air separation unit and air separation method25 Aug 2026US 12,716,651 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Latent heat and condensation exchanger11 Aug 2026US 12,704,076 B2Sustainable Energy Solutions, LLC
- Method for liquefying carbon dioxide1 Oct 2026US 2026/0298531 A1
- Method and device for coupling refrigerating and heat transfer effects10 Sep 2026US 2026/0266540 A1Cryo Rur
- Systems and methods for efficient heavy hydrocarbons removal27 Aug 2026US 2026/0251389 A1ConocoPhillips Company
- Method and plant for separation of carbon dioxide (co2)27 Aug 2026US 2026/0251390 A1Aker Carbon Capture Norway AS
- Device for purifying and liquefying helium and associated method20 Aug 2026US 2026/0243504 A1Bruker Switzerland AG
Most cited
By later US patents
- Carbon dioxide recovery156US 4,762,543 AAmoco Corporation · 1988
- LNG production using dual independent expander refrigeration cycles149US 6,412,302 B1ABB Lummus Global, Inc. - Randall Division · 2002
- Process for liquefaction of natural gas137US 6,023,942 AExxon Production Research Company · 2000
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004