F25J 3/04424
Without thermally coupled high and low pressure columns, i.e. a so-called split
Official title: {without thermally coupled high and low pressure columns, i.e. a so-called split columns}
F25J3/04424 (Without thermally coupled high and low pressure columns, i.e. a so-called split) appears on 39 US grants and 23 published applications in this corpus.
Search patents in F25J- Granted patents
- 39
- Published applications
- 23
- Assignees
- 19
- Inventors
- 80
- Latest grant
- 29 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 2 |
| 2002 | 4 | 1 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 2 | 4 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Multistage liquid storage-type condenser-evaporator and nitrogen production device using the same29 Oct 2024US 12,130,081 B2Taiyo Nippon Sanso Corporation
- Energy-efficient process for preparing nitrogen and oxygen for glass melting furnace18 Apr 2023US 11,629,914 B2Hangzhou Turning Energy Technology Development Co., Ltd.
- Air separation plant, method for obtaining a product containing argon, and method for creating an air separation plant17 Mar 2020US 10,591,209 B2Linde Aktiengesellschaft
- Air separation method14 Aug 2018US 10,048,002 B2Praxair Technology, Inc.
- Method and device for oxygen production by low-temperature separation of air at variable energy consumption24 Oct 2017US 9,797,654 B2Linde Aktiengesellschaft
- Apparatus and process for providing nitrogen and oxygen18 Sep 2025US 2025/0290692 A1Air Products and Chemicals, Inc.
- Energy-efficient process for preparing nitrogen and oxygen for glass melting furnace2 Feb 2023US 2023/0034371 A1Hangzhou Turning Energy Technology Development Co., Ltd.
- Multistage liquid storage-type condenser-evaporator and nitrogen production device using the same17 Mar 2022US 2022/0082325 A1Taiyo Nippon Sanso Corporation
- Air separation system8 Jul 2021US 2021/0207885 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and device for obtaining pure nitrogen and pure oxygen by low-temperature separation of air27 Dec 2018US 2018/0372405 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Method and apparatus for producing elevated pressure nitrogen29US 5,098,457 AUnion Carbide Industrial Gases Technology Corporation · 1992
- Air boiling process to produce low purity oxygen27US 4,410,343 AUnion Carbide Corporation · 1983
- Split column multiple condenser-reboiler air separation process23US 4,448,595 AUnion Carbide Corporation · 1984
- Rectifier liquid generated intermediate reflux for subambient cascades18US 4,854,954 A1989
- Air separation17US 4,962,646 AThe BOC Group, Inc. · 1990