C02F 1/5236
Using inorganic agents
Official title: {using inorganic agents}
C02F1/5236 (Using inorganic agents) appears on 2,115 US grants and 2,135 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,115
- Published applications
- 2,135
- Assignees
- 1,467
- Inventors
- 5,159
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 43 | 0 |
| 1977 | 38 | 0 |
| 1978 | 25 | 0 |
| 1979 | 16 | 0 |
| 1980 | 24 | 0 |
| 1981 | 17 | 0 |
| 1982 | 26 | 0 |
| 1983 | 25 | 0 |
| 1984 | 24 | 0 |
| 1985 | 18 | 0 |
| 1986 | 14 | 0 |
| 1987 | 30 | 0 |
| 1988 | 38 | 0 |
| 1989 | 26 | 0 |
| 1990 | 16 | 0 |
| 1991 | 36 | 0 |
| 1992 | 28 | 0 |
| 1993 | 35 | 0 |
| 1994 | 39 | 0 |
| 1995 | 30 | 0 |
| 1996 | 29 | 0 |
| 1997 | 30 | 0 |
| 1998 | 38 | 0 |
| 1999 | 39 | 0 |
| 2000 | 32 | 0 |
| 2001 | 53 | 10 |
| 2002 | 41 | 47 |
| 2003 | 40 | 61 |
| 2004 | 38 | 57 |
| 2005 | 37 | 49 |
| 2006 | 33 | 62 |
| 2007 | 28 | 41 |
| 2008 | 38 | 63 |
| 2009 | 27 | 74 |
| 2010 | 51 | 80 |
| 2011 | 51 | 75 |
| 2012 | 28 | 82 |
| 2013 | 41 | 87 |
| 2014 | 43 | 132 |
| 2015 | 47 | 98 |
| 2016 | 53 | 101 |
| 2017 | 74 | 117 |
| 2018 | 67 | 73 |
| 2019 | 77 | 120 |
| 2020 | 86 | 96 |
| 2021 | 77 | 130 |
| 2022 | 91 | 112 |
| 2023 | 71 | 97 |
| 2024 | 73 | 96 |
| 2025 | 86 | 103 |
| 2026 | 48 | 72 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recycling system29 Sep 2026US 12,747,175 B2Abu Dhabi University
- Method for high-value application of PTA residue high-concentration bromine-containing wastewater to preparation of cuprous bromide22 Sep 2026US 12,741,881 B2Jiangsu University of Technology
- Systems and methods for desalination of liquids22 Sep 2026US 12,741,888 B2Acquolina Il Mondo, LLC
- Efficient nitrogen and phosphorus removal process system for mariculture tail water treatment15 Sep 2026US 12,735,339 B2Tianjin Research Institute for Water Transport Engineering, M.O.T.
- Systems, methods, and compounds for sustainable wastewater treatment and co-products thereof8 Sep 2026US 12,729,144 B2
- Contaminant Precipitation Compositions and Methods of Use8 Oct 2026US 2026/0308025 A1Locus Solutions Ipco, LLC
- Method for Treating Phosphorus-Containing Wastewater Produced During Preparation of Sulfonamide Compound8 Oct 2026US 2026/0308035 A1Nanhai Beisha Pharmaceutical Co., Ltd.
- Additive combination for treatment of heavy metals and dioxins in fly ash1 Oct 2026US 2026/0295645 A1Zhejiang University
- Synergistic integrated methods for processing hydrocarbon/organic matter containing water streams17 Sep 2026US 2026/0274728 A1
- Impurity removal from brines pre/post direct lithium extraction10 Sep 2026US 2026/0265093 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Continuous process for the reclamation of waste drilling fluids141US 4,482,459 ANewpark Waste Treatment Systems Inc. · 1984
- Microalgae separator apparatus and method117US 6,524,486 B2Sepal Technologies Ltd. · 2003
- Flocculating agent for the purification of fluids86US 5,487,844 A1996
- Desalination methods and systems that include carbonate compound precipitation81US 7,931,809 B2Calera Corporation · 2011
- Method and apparatus for processing manure80US 5,290,451 AEcotechniek B. V. · 1994