C01C 1/0458
Separation of nh3
Official title: {Separation of NH3 (during purge gas treatment C01C1/0476)}
C01C1/0458 (Separation of nh3) appears on 60 US grants and 69 published applications in this corpus.
Search patents in C01C- Granted patents
- 60
- Published applications
- 69
- Assignees
- 50
- Inventors
- 159
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 6 |
| 2016 | 1 | 2 |
| 2017 | 4 | 3 |
| 2018 | 3 | 4 |
| 2019 | 3 | 4 |
| 2020 | 4 | 8 |
| 2021 | 3 | 7 |
| 2022 | 4 | 6 |
| 2023 | 4 | 2 |
| 2024 | 2 | 6 |
| 2025 | 2 | 12 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ammonia manufacturing apparatus and ammonia manufacturing method1 Sep 2026US 12,723,315 B2Kabushiki Kaisha Toshiba
- NaA zeolite membrane for recovery of ammonia28 Jul 2026US 12,691,423 B2Rensselaer Polytechnic Institute
- Control of an ammonia synthesis loop at partial load23 Jun 2026US 12,662,388 B2Casale SA
- Ammonia manufacturing apparatus and ammonia manufacturing method10 Feb 2026US 12,546,018 B2Kabushiki Kaisha Toshiba
- Ammonia synthesis system and ammonia production method27 Jan 2026US 12,534,375 B2Tsubame BHB Co., Ltd.
- Supported absorbents for ammonia separation6 Aug 2026US 2026/0225903 A1Texas Tech University System
- Ammonia synthesis with co2-neutral hydrogen14 May 2026US 2026/0132037 A1thyssenkrupp AG
- Systems and methods for the production of ammonia7 May 2026US 2026/0125273 A1
- Catalyst-Sorbent Structure for Ammonia Synthesis And Sorption and Method of Ammonia Production28 Aug 2025US 2025/0270101 A1Ammobia, Inc.
- Ammonia synthesis system and operation method thereof10 Jul 2025US 2025/0223181 A1SK Innovation Co., Ltd.
Most cited
By later US patents
- Recovery of hydrogen and nitrogen from ammonia plant purge gas55US 4,077,780 AUnion Carbide Corporation · 1978
- Pressure swing adsorption system for ammonia synthesis40US 5,711,926 A1998
- Ammonia production process24US 4,298,588 AImperial Chemical Industries PLC · 1981
- Process for the manufacture of ammonia23US 4,537,760 ATechnion Research & Development Foundation Limited · 1985
- Process for synthesizing ammonia from hydrocarbons18US 4,376,758 AMontedison S.p.A. · 1983