C01C 1/00
Ammonia
Official title: Ammonia; Compounds thereof {(C01C3/08, C01C3/14, C01C3/16, C01C3/20 take precedence)}
C01C1/00 (Ammonia) appears on 1,599 US grants and 1,603 published applications in this corpus.
Search patents in C01C- Granted patents
- 1,599
- Published applications
- 1,603
- Assignees
- 926
- Inventors
- 3,750
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 40 | 0 |
| 1977 | 34 | 0 |
| 1978 | 20 | 0 |
| 1979 | 27 | 0 |
| 1980 | 34 | 0 |
| 1981 | 31 | 0 |
| 1982 | 23 | 0 |
| 1983 | 17 | 0 |
| 1984 | 25 | 0 |
| 1985 | 27 | 0 |
| 1986 | 19 | 0 |
| 1987 | 27 | 0 |
| 1988 | 25 | 0 |
| 1989 | 20 | 0 |
| 1990 | 19 | 0 |
| 1991 | 16 | 0 |
| 1992 | 16 | 0 |
| 1993 | 25 | 0 |
| 1994 | 12 | 0 |
| 1995 | 22 | 0 |
| 1996 | 16 | 0 |
| 1997 | 11 | 0 |
| 1998 | 22 | 0 |
| 1999 | 18 | 0 |
| 2000 | 23 | 0 |
| 2001 | 31 | 13 |
| 2002 | 26 | 32 |
| 2003 | 27 | 35 |
| 2004 | 29 | 37 |
| 2005 | 23 | 21 |
| 2006 | 28 | 17 |
| 2007 | 10 | 24 |
| 2008 | 14 | 33 |
| 2009 | 14 | 30 |
| 2010 | 28 | 48 |
| 2011 | 19 | 50 |
| 2012 | 25 | 52 |
| 2013 | 30 | 46 |
| 2014 | 45 | 82 |
| 2015 | 47 | 81 |
| 2016 | 56 | 68 |
| 2017 | 56 | 72 |
| 2018 | 61 | 76 |
| 2019 | 76 | 71 |
| 2020 | 53 | 76 |
| 2021 | 60 | 100 |
| 2022 | 44 | 88 |
| 2023 | 54 | 86 |
| 2024 | 60 | 132 |
| 2025 | 63 | 138 |
| 2026 | 51 | 95 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01C 1/02Preparation, purification or separation of ammonia1,139
- C01C 1/24Sulfates of ammonium207
- C01C 1/18Nitrates of ammonium104
- C01C 1/16Halides of ammonium76
- C01C 1/003Storage or handling of ammonia70
- C01C 1/26Carbonates or bicarbonates of ammonium36
- C01C 1/28Methods of preparing ammonium salts in general34
- C01C 1/22Sulfites of ammonium22
All 9 subgroupsShow fewer
Recent patents
- Autonomous modular flare gas conversion systems and methods6 Oct 2026US 12,753,138 B2M2X Energy Inc.
- Nuclear reactor integrated oil and gas production systems and methods of operation6 Oct 2026US 12,753,674 B2Natura Resources LLC
- Solid-gas reaction to generate nitroxyl (HNO) in the gas phase22 Sep 2026US 12,740,999 B2Consejo Nacional De Investgaciones Cientficas Y Tecnicas Conicet
- Ruthenium promoter catalyst compositions15 Sep 2026US 12,735,324 B2Commonwealth Scientific and Industrial Research Organisation
- Purge gas conditioning of NH3 plants15 Sep 2026US 12,735,325 B2Stamicarbon B. V.
- Systems and methods for the production of ammonia8 Oct 2026US 2026/0308000 A1The Mosaic Company
- Ammonia Synthesis Converter and Method for Small Production Units8 Oct 2026US 2026/0308001 A1AmmPower America LLC
- Autonomous Modular Flare Gas Conversion Systems and Methods8 Oct 2026US 2026/0308093 A1M2X Energy Inc.
- Process for the production of high-purity melamine from the pyrolysis of urea, with optimization of the deammoniation step of the mother liquors8 Oct 2026US 2026/0308134 A1Eurotecnica Contractors & Engineers S.p.A.
- Method for producing low-carbon ammonia from natural gas1 Oct 2026US 2026/0296905 A1Publichnoe Aktsionernoe Obshchestvo "NOVATEK"
Most cited
By later US patents
- Apparatus for on-site production of nitrate ions409US 7,514,058 B1The Lata Group, Inc. · 2009
- Methanol plant retrofit for acetic acid manufacture208US 6,232,352 B1Acetex limited · 2001
- Composite hydrogen separation element and module185US 5,498,278 ABend Research, Inc. · 1996
- Composite hydrogen separation element and module164US 5,645,626 ABend Research, Inc. · 1997
- Nanotechnology for engineering the performance of substances140US 6,531,704 B2NanoProducts Corporation · 2003