C01B 21/0494
Combined chemical and physical processing
Official title: {Combined chemical and physical processing}
C01B21/0494 (Combined chemical and physical processing) appears on 31 US grants and 10 published applications in this corpus.
Search patents in C01B- Granted patents
- 31
- Published applications
- 10
- Assignees
- 24
- Inventors
- 71
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for obtaining high purity nitrogen in nitrogen gas purification applications and a method thereof17 Feb 2026US 12,552,669 B2Mikropor Makina Sana Yi Ve Ticaret Anonim Sirketi
- Process for argon and nitrogen production31 Aug 2021US 11,104,576 B2Casale SA
- Inert gas generating system29 Dec 2020US 10,874,980 B2Hamilton Sundstrand Corporation
- Process and apparatus for removing carbon monoxide from a gas stream11 Mar 2003US 6,531,105 B1Air Liquide America Corporation
- Purification of gases28 Jan 2003US 6,511,640 B1The BOC Group, Inc.
- Processes and apparatuses for treating nox separated from carbon dioxide28 May 2026US 2026/0145938 A1Uop LLC
- A system for obtaining high purity nitrogen in nitrogen gas purification applications and a method thereof20 Jul 2023US 2023/0227310 A1Mikropor Makina Sanayi Ve Ticaret Anonim Sirketi
- Air treatment system9 Jun 2022US 2022/0176313 A1Honeywell International Inc.
- Process for argon and nitrogen production28 May 2020US 2020/0165131 A1Casale SA
- Dip-conduit purification apparatus and method of purifying a gas2 Apr 2020US 2020/0101412 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Process for the separation/recovery of gases114US 6,179,900 B2GKSS-Forschungszentrum Geesthacht GmbH · 2001
- Process and system for the production of dry, high purity nitrogen99US 4,931,070 AUnion Carbide Corporation · 1990
- Apparatus for low temperature purification of gases78US 5,202,096 AThe BOC Group, Inc. · 1993
- Methods for purifying inert gas streams74US 4,579,723 AThe BOC Group, Inc. · 1986
- Production of membrane-derived nitrogen from combustion gases57US 4,781,907 A1988