A47L 11/4027
Filtering or separating contaminants or debris
Official title: {Filtering or separating contaminants or debris}
A47L11/4027 (Filtering or separating contaminants or debris) appears on 294 US grants and 329 published applications in this corpus.
Search patents in A47L- Granted patents
- 294
- Published applications
- 329
- Assignees
- 126
- Inventors
- 610
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 6 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 10 | 0 |
| 2000 | 8 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 3 |
| 2003 | 1 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 4 |
| 2006 | 0 | 4 |
| 2007 | 5 | 3 |
| 2008 | 1 | 9 |
| 2009 | 2 | 5 |
| 2010 | 5 | 2 |
| 2011 | 0 | 4 |
| 2012 | 4 | 6 |
| 2013 | 7 | 4 |
| 2014 | 7 | 13 |
| 2015 | 9 | 6 |
| 2016 | 7 | 6 |
| 2017 | 9 | 22 |
| 2018 | 6 | 6 |
| 2019 | 19 | 28 |
| 2020 | 15 | 20 |
| 2021 | 23 | 39 |
| 2022 | 18 | 19 |
| 2023 | 24 | 27 |
| 2024 | 23 | 32 |
| 2025 | 13 | 27 |
| 2026 | 12 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pool robot6 Oct 2026US 12,753,620 B2Xingmai Innovation Technology (Suzhou) Co., Ltd.
- Air/liquid separation system for an extraction cleaner29 Sep 2026US 12,745,887 B2BISSELL Inc.
- Recovery tank22 Sep 2026US 12,740,683 B2SharkNinja Operating LLC
- Surface cleaning apparatus8 Sep 2026US 12,727,731 B2Omachron Intellectual Property Inc.
- Support device of cleaner and cleaner unit18 Aug 2026US 12,708,242 B2LG Electronics Inc.
- User-prompted cleaning by autonomous vacuum8 Oct 2026US 2026/0305895 A1Matic Robots, Inc. (fka Matician, Inc.)
- Mobile cleaning robot with variable cleaning features8 Oct 2026US 2026/0305896 A1iRobot Corporation
- Cleaning robot24 Sep 2026US 2026/0283429 A1Beijing Roborock Technology Co., Ltd.
- Surface cleaning apparatus24 Sep 2026US 2026/0283435 A1Omachron Intellectual Property Inc.
- Pool Robot17 Sep 2026US 2026/0275744 A1Xingmai Innovation Technology (Suzhou) Co., Ltd.
Most cited
By later US patents
- Mobile work robot system511US 5,959,423 AMinolta Co., Ltd. · 1999
- Autonomous surface cleaning robot for wet and dry cleaning295US 7,761,954 B2iRobot Corporation · 2010
- Mobile walk-behind sweeper178US 6,041,471 AMadvac International Inc. · 2000
- Scrubber vac-fan seal158US 5,943,730 ATennant Company · 1999
- Hand-guided sweeping machine156US 4,974,283 AHako-Werke GmbH · 1990