C01B 3/025
Preparation or purification of gas mixtures for ammonia synthesis
C01B3/025 (Preparation or purification of gas mixtures for ammonia synthesis) appears on 283 US grants and 313 published applications in this corpus.
Search patents in C01B- Granted patents
- 283
- Published applications
- 313
- Assignees
- 155
- Inventors
- 605
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 11 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 9 | 0 |
| 1992 | 2 | 0 |
| 1993 | 7 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 1 |
| 2002 | 3 | 9 |
| 2003 | 6 | 2 |
| 2004 | 3 | 6 |
| 2005 | 1 | 5 |
| 2006 | 2 | 4 |
| 2007 | 3 | 3 |
| 2008 | 4 | 4 |
| 2009 | 3 | 5 |
| 2010 | 3 | 11 |
| 2011 | 2 | 16 |
| 2012 | 4 | 10 |
| 2013 | 6 | 5 |
| 2014 | 6 | 8 |
| 2015 | 9 | 18 |
| 2016 | 14 | 18 |
| 2017 | 6 | 14 |
| 2018 | 12 | 12 |
| 2019 | 14 | 18 |
| 2020 | 12 | 24 |
| 2021 | 21 | 20 |
| 2022 | 8 | 15 |
| 2023 | 12 | 24 |
| 2024 | 13 | 27 |
| 2025 | 10 | 22 |
| 2026 | 10 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Autonomous modular flare gas conversion systems and methods6 Oct 2026US 12,753,138 B2M2X Energy Inc.
- Purge gas conditioning of NH3 plants15 Sep 2026US 12,735,325 B2Stamicarbon B. V.
- Direct reduced iron system and method21 Jul 2026US 12,686,893 B2Nucor Corporation
- Processes and systems for converting a hydrocarbon-containing feed7 Jul 2026US 12,674,106 B2ExxonMobil Chemical Patents Inc.
- Ammonification device and method using plasma discharging in water9 Jun 2026US 12,649,139 B2Korea Institute of Machinery & Materials
- Autonomous Modular Flare Gas Conversion Systems and Methods8 Oct 2026US 2026/0308093 A1M2X Energy Inc.
- A method for storing hydrogen in a reactor or a synthesis loop24 Sep 2026US 2026/0285677 A1Topsoe A/S
- Process for producing low-carbon ammonia from natural gas24 Sep 2026US 2026/0285696 A1Publichnoe Aktsionernoe Obshchestvo "NOVATEK"
- Process for producing a carbon product and carbon fibers through a carbon neutral or carbon negative process13 Aug 2026US 2026/0233165 A1Carbon Utility LLC
- Method for producing ammonia with reduced emissions and system thereof13 Aug 2026US 2026/0234011 A1Yara Clean Ammonia AS
Most cited
By later US patents
- Method for the production of hydrogen-containing gaseous mixtures233US 6,685,754 B2Alchemix Corporation · 2004
- Energy recovery72US 4,733,528 AImperial Chemical Industries PLC · 1988
- Preparation of ammonia synthesis gas54US 4,479,925 AThe M. W. Kellogg Company · 1984
- Process for producing and utilizing an oxygen enriched gas53US 5,245,110 AStarchem GmbH · 1993
- Method for the production of hydrogen and applications thereof53US 6,663,681 B2Alchemix Corporation · 2003