C02F 1/5272
Using specific organic precipitants
Official title: {using specific organic precipitants}
C02F1/5272 (Using specific organic precipitants) appears on 197 US grants and 202 published applications in this corpus.
Search patents in C02F- Granted patents
- 197
- Published applications
- 202
- Assignees
- 202
- Inventors
- 642
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 10 | 0 |
| 1995 | 6 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 1 | 4 |
| 2007 | 0 | 3 |
| 2008 | 0 | 1 |
| 2009 | 4 | 2 |
| 2010 | 1 | 3 |
| 2011 | 2 | 7 |
| 2012 | 1 | 2 |
| 2013 | 1 | 6 |
| 2014 | 4 | 25 |
| 2015 | 2 | 20 |
| 2016 | 12 | 9 |
| 2017 | 11 | 6 |
| 2018 | 11 | 8 |
| 2019 | 12 | 15 |
| 2020 | 5 | 11 |
| 2021 | 12 | 18 |
| 2022 | 10 | 10 |
| 2023 | 11 | 15 |
| 2024 | 10 | 8 |
| 2025 | 8 | 16 |
| 2026 | 3 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Floculant formulation based on chitosan compatible with disinfection products and method of preparation8 Sep 2026US 12,729,142 B2Industrias Vepinsa, S.A. de C.V.
- Coagulating agent of plant origin for water treatment1 Sep 2026US 12,722,992 B2ServiecologíA Y Tratamiento De Aguas, S.L.
- Methods for the formation of nanoplastics and the agglomeration/removal of micro- and nanoplastics in water21 Apr 2026US 12,606,468 B2Valparaiso University
- Method of floculation using a metal-organic-framework11 Nov 2025US 12,466,748 B2City University of Hong Kong
- Flocculant for treating fracturing flowback fluid and preparation method therefor11 Nov 2025US 12,466,749 B1Shineon Environments Technology Services Co., Ltd.
- Method and system for controlling biofouling with fluorescent biodispersant3 Sep 2026US 2026/0257946 A1Chemtreat, Inc.
- Method for treating a suspension of solid particles in water using a polymer in a crystalline form of 2-acrylamido-2-methylpropanesulphonic acid sodium salt27 Aug 2026US 2026/0250162 A1Snf Group
- Liquid composite thallium removal agent and preparation method and application thereof30 Jul 2026US 2026/0217584 A1South China Normal University
- Removal of metal ions in water for electrolysis23 Jul 2026US 2026/0209091 A1University of Houston System
- Methods for the Formation of Nanoplastics and the Agglomeration/Removal of Micro- and Nanoplastics in Water2 Jul 2026US 2026/0184611 A1Valparaiso University
Most cited
By later US patents
- Wastewater energy recycling method81US 4,159,944 A1979
- Removal of heavy metals from waste water61US 4,731,187 AMiyoshi Yushi Kabushiki Kaisha · 1988
- Dithiocarbamate polymers57US 5,164,095 ANalco Chemical Company · 1992
- Method for removing metals from a fluid stream48US 5,346,627 ANalco Chemical Company · 1994
- Method of removing heavy metal from wastewater streams47US 4,678,584 ACX/Oxytech, Inc. · 1987