Ammonia
Official title: AMMONIA; CYANOGEN; COMPOUNDS THEREOF ({metal hydrides, monoborane, diborane or addition complexes thereof C01B6/00}; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; azides C01B21/08; {compounds other than ammonia or cyanogen, containing nitrogen, non-metals and optionally metals C01B21/082}; metal imides or amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; compounds containing silicon C01B33/00; compounds containing boron C01B35/00)
C01C (Ammonia) appears on 2,019 US grants and 1,884 published applications in this corpus.
Search patents in C01C- Granted patents
- 2,019
- Published applications
- 1,884
- Assignees
- 1,083
- Inventors
- 4,680
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 58 | 0 |
| 1977 | 42 | 0 |
| 1978 | 34 | 0 |
| 1979 | 36 | 0 |
| 1980 | 40 | 0 |
| 1981 | 39 | 0 |
| 1982 | 28 | 0 |
| 1983 | 30 | 0 |
| 1984 | 37 | 0 |
| 1985 | 36 | 0 |
| 1986 | 25 | 0 |
| 1987 | 31 | 0 |
| 1988 | 29 | 0 |
| 1989 | 27 | 0 |
| 1990 | 23 | 0 |
| 1991 | 26 | 0 |
| 1992 | 29 | 0 |
| 1993 | 33 | 0 |
| 1994 | 18 | 0 |
| 1995 | 31 | 0 |
| 1996 | 18 | 0 |
| 1997 | 16 | 0 |
| 1998 | 30 | 0 |
| 1999 | 29 | 0 |
| 2000 | 38 | 0 |
| 2001 | 41 | 16 |
| 2002 | 33 | 45 |
| 2003 | 37 | 42 |
| 2004 | 33 | 43 |
| 2005 | 28 | 26 |
| 2006 | 33 | 24 |
| 2007 | 14 | 29 |
| 2008 | 21 | 41 |
| 2009 | 17 | 34 |
| 2010 | 32 | 59 |
| 2011 | 22 | 66 |
| 2012 | 33 | 58 |
| 2013 | 35 | 52 |
| 2014 | 53 | 101 |
| 2015 | 57 | 103 |
| 2016 | 72 | 94 |
| 2017 | 76 | 82 |
| 2018 | 69 | 91 |
| 2019 | 84 | 76 |
| 2020 | 64 | 89 |
| 2021 | 68 | 112 |
| 2022 | 49 | 98 |
| 2023 | 64 | 101 |
| 2024 | 69 | 145 |
| 2025 | 73 | 147 |
| 2026 | 59 | 110 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
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
- Gauzes having a tertiary structure for the catalytic conversion of fluids15 Sep 2026US 12,734,513 B2
- Ruthenium promoter catalyst compositions15 Sep 2026US 12,735,324 B2Commonwealth Scientific and Industrial Research Organisation
- 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.
- Process for recovering platinum-group metal from waste catalyst by using biocyanide and ionic liquid8 Oct 2026US 2026/0308713 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
Most cited
- Method of topologically restricted plasma-enhanced cyclic deposition of silicon or metal nitride426US 10,340,135 B2ASM IP Holding B. V. · 2019
- 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
- Solid multi-component membranes, electrochemical reactor components, electrochemical reactors and use of membranes, reactor components, and reactor for oxidation reactions202US 5,306,411 AThe Standard Oil Company · 1994
- Amperometric sensor194US 7,135,100 B1Drew Scientific Ventures LLC · 2006