F25J 3/0247
Separation of cnhm with 4 carbon atoms or more
Official title: {separation of CnHm with 4 carbon atoms or more}
F25J3/0247 (Separation of cnhm with 4 carbon atoms or more) appears on 177 US grants and 147 published applications in this corpus.
Search patents in F25J- Granted patents
- 177
- Published applications
- 147
- Assignees
- 77
- Inventors
- 307
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 4 |
| 2006 | 2 | 7 |
| 2007 | 8 | 4 |
| 2008 | 1 | 6 |
| 2009 | 3 | 4 |
| 2010 | 1 | 5 |
| 2011 | 3 | 4 |
| 2012 | 1 | 5 |
| 2013 | 1 | 4 |
| 2014 | 3 | 5 |
| 2015 | 2 | 6 |
| 2016 | 5 | 5 |
| 2017 | 10 | 10 |
| 2018 | 3 | 8 |
| 2019 | 8 | 22 |
| 2020 | 7 | 7 |
| 2021 | 8 | 14 |
| 2022 | 16 | 9 |
| 2023 | 11 | 4 |
| 2024 | 7 | 7 |
| 2025 | 2 | 3 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Process for liquefaction of natural gas137US 6,023,942 AExxon Production Research Company · 2000
- Distillative separations of gas mixtures containing methane, carbon dioxide and other components129US 4,462,814 AKoch Process Systems, Inc. · 1984
- Process for liquefying a natural gas stream containing at least one freezable component123US 5,956,971 AExxon Production Research Company · 1999
- Distillative processing of CO.sub.2 and hydrocarbons for enhanced oil recovery109US 4,753,666 AChevron Research Company · 1988
- Integrated high pressure NGL recovery in the production of liquefied natural gas94US 6,662,589 B1Air Products and Chemicals, Inc. · 2003