B01D 21/01
Separation of suspended solid particles from liquids by sedimentation: using flocculating agents
Official title: using flocculating agents (for purifying water C02F1/52; for liquid radioactive waste G21F9/10)
B01D21/01 (Separation of suspended solid particles from liquids by sedimentation: using flocculating agents) appears on 828 US grants and 699 published applications in this corpus.
Search patents in B01D- Granted patents
- 828
- Published applications
- 699
- Assignees
- 579
- Inventors
- 1,922
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 14 | 0 |
| 1978 | 15 | 0 |
| 1979 | 8 | 0 |
| 1980 | 15 | 0 |
| 1981 | 12 | 0 |
| 1982 | 20 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 8 | 0 |
| 1992 | 14 | 0 |
| 1993 | 8 | 0 |
| 1994 | 16 | 0 |
| 1995 | 19 | 0 |
| 1996 | 23 | 0 |
| 1997 | 24 | 0 |
| 1998 | 29 | 0 |
| 1999 | 20 | 0 |
| 2000 | 26 | 0 |
| 2001 | 16 | 6 |
| 2002 | 10 | 12 |
| 2003 | 14 | 9 |
| 2004 | 6 | 21 |
| 2005 | 16 | 14 |
| 2006 | 12 | 20 |
| 2007 | 11 | 19 |
| 2008 | 6 | 15 |
| 2009 | 10 | 10 |
| 2010 | 13 | 14 |
| 2011 | 6 | 18 |
| 2012 | 8 | 26 |
| 2013 | 15 | 32 |
| 2014 | 10 | 26 |
| 2015 | 19 | 44 |
| 2016 | 18 | 44 |
| 2017 | 28 | 44 |
| 2018 | 35 | 45 |
| 2019 | 41 | 37 |
| 2020 | 31 | 49 |
| 2021 | 38 | 57 |
| 2022 | 43 | 36 |
| 2023 | 32 | 38 |
| 2024 | 26 | 27 |
| 2025 | 19 | 20 |
| 2026 | 10 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device and method for treating green liquor11 Aug 2026US 12,703,943 B2Valmet Corporation
- Cascading co-precipitation system23 Jun 2026US 12,662,392 B2Ascend Elements, Inc.
- Separation of fluids containing solids28 Apr 2026US 12,611,678 B2World Water Works, Inc.
- High rate thickener and eductors therefor14 Apr 2026US 12,600,656 B2Marmon Industrial Water LLC
- Method for removing silicon powder in coolant for monocrystalline silicon slicing with diamond wire10 Mar 2026US 12,569,784 B2Tcl Zhonghuan Renewable Energy Technology Co., Ltd.
- Plasma separation apparatus and plasma separation method24 Sep 2026US 2026/0284556 A1Canon Medical Systems Corporation
- 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
- A system for generating and using nox gases in an algae growth system13 Aug 2026US 2026/0233160 A1Paradigm Fuels Pty Ltd
- Separation of fluids containing solids13 Aug 2026US 2026/0233236 A1World Water Works, Inc.
- Method for determining flocculation state and method of flocculation treatment13 Aug 2026US 2026/0234036 A1Kurita Water Industries Ltd.
Most cited
By later US patents
- Microalgae separator apparatus and method117US 6,524,486 B2Sepal Technologies Ltd. · 2003
- Process for reversible thickening of a liquid111US 4,735,731 AThe Dow Chemical Company · 1988
- Method for separating oil and water emulsions104US 4,938,876 A1990
- Device for separating a blood component from blood or plasma94US 5,738,784 AE. R. Squibb & Sons, Inc. · 1998
- Method for using ligands in particle separation84US 6,153,113 ACobe Laboratories, Inc. · 2000