B03B 5/28
Washing granular, powdered or lumpy materials: by sink-float separation
Official title: by sink-float separation
B03B5/28 (Washing granular, powdered or lumpy materials: by sink-float separation) appears on 518 US grants and 346 published applications in this corpus.
Search patents in B03B- Granted patents
- 518
- Published applications
- 346
- Assignees
- 346
- Inventors
- 1,020
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 12 | 0 |
| 1978 | 6 | 0 |
| 1979 | 11 | 0 |
| 1980 | 13 | 0 |
| 1981 | 10 | 0 |
| 1982 | 10 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 2 | 0 |
| 1988 | 9 | 0 |
| 1989 | 11 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 14 | 0 |
| 1993 | 17 | 0 |
| 1994 | 18 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 15 | 0 |
| 1998 | 9 | 0 |
| 1999 | 13 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 1 |
| 2002 | 6 | 3 |
| 2003 | 8 | 8 |
| 2004 | 2 | 13 |
| 2005 | 6 | 13 |
| 2006 | 14 | 8 |
| 2007 | 3 | 6 |
| 2008 | 7 | 17 |
| 2009 | 6 | 16 |
| 2010 | 9 | 11 |
| 2011 | 6 | 9 |
| 2012 | 9 | 6 |
| 2013 | 6 | 8 |
| 2014 | 6 | 10 |
| 2015 | 7 | 16 |
| 2016 | 13 | 13 |
| 2017 | 22 | 23 |
| 2018 | 11 | 15 |
| 2019 | 16 | 30 |
| 2020 | 10 | 20 |
| 2021 | 21 | 17 |
| 2022 | 18 | 22 |
| 2023 | 12 | 16 |
| 2024 | 22 | 19 |
| 2025 | 17 | 14 |
| 2026 | 6 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Centrifugal density separation of waste plastic6 Oct 2026US 12,752,283 B2Eastman Chemical Company
- System and method for processing a slurry29 Sep 2026US 12,747,645 B2Flowback Fluids LLC
- System and method for recycling plastics7 Jul 2026US 12,673,331 B2
- Portable cooking system and apparatus for panning for gold19 May 2026US 12,629,694 B1
- Purification apparatus3 Mar 2026US 12,564,845 B2Shimadzu Corporation
- Centrifugal separator having an improved flow and system comprising such a centrifugal separator24 Sep 2026US 2026/0284674 A1FLSmidth A/S
- System and Method for Reclaiming and Cleaning Sand20 Aug 2026US 2026/0241389 A1McLanahan Corporation
- Method for the separation and recovery of plastics and contaminants through multi-stage separation process13 Aug 2026US 2026/0233268 A1
- Separation of minerals by specific gravity9 Jul 2026US 2026/0192309 A1Good Earth IP Holdings, LLC
- System and method for recovering desired materials using a pan mill2 Jul 2026US 2026/0183773 A1
Most cited
By later US patents
- Recycling system100US 5,143,308 APlastic Recycling Alliance, LP · 1992
- Process for reducing sulfur emissions with calcium-containing sorbents75US 5,368,617 AGenesis Research Corporation · 1994
- Plastics separation and recycling methods73US 4,830,188 ARutgers, The State University · 1989
- Process for separation and recovery of waste carpet components71US 5,722,603 AAlliedSignal Inc. /DSM N.V. · 1998
- Process for recovery of corn coarse fiber (pericarp)70US 6,254,914 B1The Board of Trustees of the University of Illinois · 2001