A47L 9/1633
Concentric cyclones
Official title: {Concentric cyclones}
A47L9/1633 (Concentric cyclones) appears on 249 US grants and 272 published applications in this corpus.
Search patents in A47L- Granted patents
- 249
- Published applications
- 272
- Assignees
- 46
- Inventors
- 288
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 3 |
| 2002 | 4 | 0 |
| 2003 | 5 | 1 |
| 2004 | 2 | 3 |
| 2005 | 0 | 0 |
| 2006 | 2 | 2 |
| 2007 | 1 | 4 |
| 2008 | 1 | 6 |
| 2009 | 3 | 19 |
| 2010 | 8 | 7 |
| 2011 | 9 | 3 |
| 2012 | 6 | 14 |
| 2013 | 4 | 10 |
| 2014 | 14 | 8 |
| 2015 | 12 | 11 |
| 2016 | 6 | 17 |
| 2017 | 10 | 28 |
| 2018 | 12 | 39 |
| 2019 | 38 | 23 |
| 2020 | 28 | 22 |
| 2021 | 16 | 14 |
| 2022 | 23 | 7 |
| 2023 | 12 | 15 |
| 2024 | 9 | 7 |
| 2025 | 4 | 3 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dust collector, vacuum cleaner, and cleaning device22 Sep 2026US 12,740,680 B2Samsung Electronics Co., Ltd.
- Debris cleaning mechanism and cleaning device24 Feb 2026US 12,557,954 B2Beijing Roborock Technology Co., Ltd.
- Configuration of a cyclone assembly and surface cleaning apparatus having same26 Aug 2025US 12,396,604 B2Omachron Intellectual Property Inc.
- Cleaner system1 Jul 2025US 12,342,980 B2LG Electronics Inc.
- Surface cleaning apparatus18 Mar 2025US 12,251,716 B2Omachron Intellectual Property Inc.
- Vacuum cleaner having two stages of spiral separation structures1 Oct 2026US 2026/0294191 A1
- Dust collecting apparatus, vacuum cleaner, and cleaning apparatus16 Jul 2026US 2026/0198738 A1Samsung Electronics Co., Ltd.
- Robot cleaner and cleaner system7 May 2026US 2026/0123804 A1LG Electronics Inc.
- Cleaner26 Feb 2026US 2026/0053315 A1LG Electronics Inc.
- Cleaner and cleaner system12 Feb 2026US 2026/0041294 A1LG Electronics Inc.
Most cited
By later US patents
- Cyclonic back-pack vacuum cleaner370US 5,267,371 AIona Appliances Inc. · 1993
- Shroud330US 5,078,761 ANotetry Limited · 1992
- Vacuum cleaner327US 6,553,612 B1Dyson Limited · 2003
- Vacuum cleaning apparatus260US 4,826,515 APrototypes, Ltd. · 1989
- Combined disc and shroud for dual cyclonic cleaning apparatus186US 4,853,008 ANotetry Limited · 1989