C01C 1/0476
Purge gas treatment
Official title: {Purge gas treatment, e.g. for removal of inert gases or recovery of H2}
C01C1/0476 (Purge gas treatment) appears on 51 US grants and 30 published applications in this corpus.
Search patents in C01C- Granted patents
- 51
- Published applications
- 30
- Assignees
- 39
- Inventors
- 114
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 5 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 3 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 3 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 4 |
| 2019 | 1 | 2 |
| 2020 | 2 | 3 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 3 |
| 2025 | 1 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Purge gas conditioning of NH3 plants15 Sep 2026US 12,735,325 B2Stamicarbon B. V.
- Production system and method of production for organic compound or microorganism4 Mar 2025US 12,241,103 B2Ajinomoto Co., Inc.
- Method for producing ammonia24 Jan 2023US 11,560,306 B2Gasontec GmbH
- Process for the synthesis of ammonia1 Mar 2022US 11,261,099 B2Casale SA
- System and method to synthesize ammonia13 Apr 2021US 10,974,970 B2Gas Technology Institute
- Method for producing ammonia with reduced emissions and system thereof13 Aug 2026US 2026/0234011 A1Yara Clean Ammonia AS
- Method for production of blue ammonia6 Aug 2026US 2026/0225904 A1Topsoe A/S
- Ammonia synthesis system and its operation method14 Aug 2025US 2025/0256974 A1SK Innovation Co., Ltd.
- Purge gas conditioning of nh3 plants14 Aug 2025US 2025/0256975 A1Stamicarbon B. V.
- System for recovering inert gases from an ammonia synthesis loop and method thereof26 Sep 2024US 2024/0317595 A1Yara International Asa
Most cited
By later US patents
- Method of preparing ammonia46US 5,169,717 AHaldor Topsoe A/S · 1992
- Argon recovery from hydrogen depleted ammonia plant purge gas utilizing a combination of cryogenic and non-cryogenic separating means42US 4,687,498 AThe BOC Group, Inc. · 1987
- Process for hydrogen recovery from ammonia purge gases41US 4,180,552 AMonsanto Company · 1979
- Energy process in methanol synthesis36US 4,309,359 AImperial Chemical Industries PLC · 1982
- Process for hydrogen recovery from ammonia purge gases34US 4,180,553 AMonsanto Company · 1979