C01C 1/08
Preparation of ammonia from nitrogenous organic substances
C01C1/08 (Preparation of ammonia from nitrogenous organic substances) appears on 73 US grants and 82 published applications in this corpus.
Search patents in C01C- Granted patents
- 73
- Published applications
- 82
- Assignees
- 64
- Inventors
- 181
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 1 |
| 2003 | 3 | 6 |
| 2004 | 2 | 5 |
| 2005 | 3 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 6 |
| 2009 | 1 | 8 |
| 2010 | 0 | 3 |
| 2011 | 1 | 6 |
| 2012 | 5 | 4 |
| 2013 | 2 | 2 |
| 2014 | 2 | 5 |
| 2015 | 6 | 6 |
| 2016 | 4 | 5 |
| 2017 | 5 | 3 |
| 2018 | 2 | 4 |
| 2019 | 4 | 3 |
| 2020 | 1 | 1 |
| 2021 | 0 | 4 |
| 2022 | 4 | 0 |
| 2023 | 2 | 3 |
| 2024 | 0 | 0 |
| 2025 | 3 | 0 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for sequential energization of heating elements in an electric ammonia cracking unit24 Mar 2026US 12,582,957 B1First Ammonia Motors, Inc.
- Ammonia synthesis methods and systems10 Mar 2026US 12,570,536 B2President and Fellows of Harvard College
- Systems and methods for sequential energization of heating elements in an electric catalyst unit for ammonia dissociation9 Sep 2025US 12,409,434 B1First Ammonia Motors, Inc.
- Modular artificial intelligence-driven plasma gasification process for resource recovery20 May 2025US 12,305,131 B1Oceanit Laboratories, Inc.
- Methods for reducing condensation7 Jan 2025US 12,188,074 B2Saudi Arabian Oil Company
- Method for reducing carbon dioxide emissions in a urea plant12 Mar 2026US 2026/0070875 A1Yara International Asa
- Photodriven transfer hydrogenation of n2 to nh330 Nov 2023US 2023/0382749 A1
- Device and method for suppressing formation of high-melting-point pipe-clogging substance30 Nov 2023US 2023/0383682 A1Mitsui E&S Co., Ltd.
- Ammonia synthesis methods and systems5 Jan 2023US 2023/0002239 A1President and Fellows of Harvard College
- Combined Catalyst Precursor/Surfactant Mixture For Reductant Urea Solution For Selective Catalytic Reduction23 Sep 2021US 2021/0293169 A1Southwest Research Institute
Most cited
By later US patents
- Method and apparatus for producing ammonia (NH3)53US 6,928,807 B2MAN Nutzfahrzeuge AG · 2005
- Method for converting urea to ammonia49US 5,827,490 ANoell GmbH · 1998
- Process for the in-line hydrolysis of urea40US 5,240,688 AFuel Tech, Inc. · 1993
- Method for converting urea to ammonia38US 5,281,403 ANoell GmbH · 1994
- Methods for the production of ammonia from urea and/or biuret, and uses for NO.sub.x and/or particulate matter removal35US 6,077,491 AEC&C Technologies, Inc. · 2000