F25J 3/04727
Using an auxiliary pure argon column for nitrogen rejection
Official title: {using an auxiliary pure argon column for nitrogen rejection (F25J3/04739 takes precedence)}
F25J3/04727 (Using an auxiliary pure argon column for nitrogen rejection) appears on 55 US grants and 67 published applications in this corpus.
Search patents in F25J- Granted patents
- 55
- Published applications
- 67
- Assignees
- 12
- Inventors
- 91
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
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| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 2 | 5 |
| 2016 | 1 | 6 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 5 |
| 2020 | 6 | 4 |
| 2021 | 5 | 8 |
| 2022 | 0 | 5 |
| 2023 | 5 | 8 |
| 2024 | 4 | 11 |
| 2025 | 9 | 2 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for configuring a control system for a process plant29 Sep 2026US 12,747,912 B2Linde Aktiengesellschaft
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- Method for operating a process plant10 Mar 2026US 12,571,586 B2Linde Aktiengesellschaft
- Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants30 Dec 2025US 12,510,294 B2Linde Aktiengesellschaft
- Method for cryogenic separation of air, and air separation plant10 Sep 2026US 2026/0266538 A1
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo Nippon Sanso Corporation
- 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
- Argon column for air separation unit and air separation unit13 Mar 2025US 2025/0085050 A1Taiyo Nippon Sanso Corporation
Most cited
By later US patents
- Argon purification28US 5,019,145 ALinde Aktiengesellschaft · 1991
- Process and apparatus for recovery of pure argon15US 5,590,544 ALinde Aktiengesellschaft · 1997
- Air separation13US 5,692,396 AThe BOC Group, Inc. · 1997
- Method and apparatus for recovering argon from an air fractionating process11US 4,057,407 AS.I.A.D. Societa' Italiana Acetilene E Derivati · 1977
- Method of air separation11US 5,207,066 A1993