C01F 11/38
Preparation with nitric acid or nitrogen oxides
C01F11/38 (Preparation with nitric acid or nitrogen oxides) appears on 19 US grants and 14 published applications in this corpus.
Search patents in C01F- Granted patents
- 19
- Published applications
- 14
- Assignees
- 18
- Inventors
- 41
- Latest grant
- 16 Feb 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 2 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 0 |
| 2020 | 1 | 3 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for the management of phosphogypsum16 Feb 2021US 10,919,774 B2Ferin Sp. Z O.O
- System and method for desulfurization and denitrification integrated treatment and recycling of flue gas by using red mud24 Nov 2020US 10,843,131 B2Kunming University of Science and Technology
- Method of treating phosphate-containing ash from waste-incineration plants by wet-chemical digestion in order to obtain compounds of aluminium, calcium, phosphorus and nitrogen27 Aug 2019US 10,392,260 B2Remondis Aqua GmbH & Co. KG
- Method for complex treatment of phosphogypsum6 Aug 2019US 10,370,258 B2Ferin Sp. Z O.O
- Pulse jet system and method22 Aug 2017US 9,737,865 B2Altmerge, LLC
- Method For Recovering Rare Earths And Coproducts From Phosphogypsum And Phosphoric Acid Sludge10 Sep 2026US 2026/0265867 A1Universite Mohammed VI Polytechnique
- Plant and method for the purification of fumes and recovery of secondary raw material12 Feb 2026US 2026/0042062 A1Italcer S.P.A. Società Benefit
- Microbiological method of nitrification for production of organic fertilizers18 Dec 2025US 2025/0382238 A1Uab Agrichem Innovation
- Drilling fluid for hydrocarbon wells and manufacturing process thereof25 Jun 2020US 2020/0199437 A1Orinoco Drilling Fluids LLC
- System and method for desulfurization and denitrification integrated treatment and recycling of flue gas by using red mud11 Jun 2020US 2020/0179872 A1Kunming University of Science and Technology
Most cited
By later US patents
- Production of chemical compounds29US 9,084,978 B22015
- Continuous process for the manufacture of metal salt solutions from water-insoluble metal compounds and mineral acids12US 4,724,132 A1988
- Apparatus to remove acid gases from a flue gas11US 5,397,549 A1995
- Production of precipitated calcium carbonate from papermaking sludge and sludge-derived ash11US 5,961,941 AThermo Fibergen, Inc. · 1999
- Method of recovering minerals from papermaking sludge and sludge-derived ash10US 5,919,424 AThermo Fibergen, Inc. · 1999