A47L 15/4229
Water softening arrangements
Official title: {Water softening arrangements}
A47L15/4229 (Water softening arrangements) appears on 89 US grants and 114 published applications in this corpus.
Search patents in A47L- Granted patents
- 89
- Published applications
- 114
- Assignees
- 43
- Inventors
- 254
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 0 |
| 2003 | 2 | 0 |
| 2004 | 3 | 6 |
| 2005 | 0 | 9 |
| 2006 | 1 | 3 |
| 2007 | 2 | 1 |
| 2008 | 1 | 4 |
| 2009 | 2 | 2 |
| 2010 | 3 | 2 |
| 2011 | 2 | 1 |
| 2012 | 0 | 5 |
| 2013 | 0 | 6 |
| 2014 | 0 | 6 |
| 2015 | 2 | 8 |
| 2016 | 8 | 11 |
| 2017 | 7 | 6 |
| 2018 | 11 | 7 |
| 2019 | 5 | 3 |
| 2020 | 4 | 4 |
| 2021 | 5 | 4 |
| 2022 | 4 | 8 |
| 2023 | 0 | 6 |
| 2024 | 7 | 3 |
| 2025 | 5 | 2 |
| 2026 | 0 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dishwasher11 Nov 2025US 12,465,192 B2Samsung Electronics Co., Ltd.
- System and method for determining presence of water softener21 Oct 2025US 12,446,755 B2Haier US Appliance Solutions, Inc.
- Dish washer and controlling method thereof22 Apr 2025US 12,279,734 B2Samsung Electronics Co., Ltd.
- Dish washer and method for controlling the same28 Jan 2025US 12,207,777 B2Samsung Electronics Co., Ltd.
- Dishwasher with liquid storage tank21 Jan 2025US 12,201,254 B2Whirlpool Corporation
- Dishwasher8 Oct 2026US 2026/0305906 A1Samsung Electronics Co., Ltd.
- Water treatment apparatus and washing apparatus including same3 Sep 2026US 2026/0257943 A1LG Electronics Inc.
- Dishwasher27 Aug 2026US 2026/0248354 A1LG Electronics Inc.
- Dishwasher27 Aug 2026US 2026/0248359 A1LG Electronics Inc.
- Dishwasher tank2 Jul 2026US 2026/0182812 A1Everever
Most cited
By later US patents
- Household appliance using water, namely, a washing machine, with improved device for reducing the water hardness49US 6,766,812 B1ELTEK S.p.A. · 2004
- Household appliance using water, namely a washing machine, with improved device for softening the water38US 6,823,878 B1ELTEK S.p.A. · 2004
- Dishwashing machine36US 6,675,818 B1Aweco Appliance Systems GmbH & Co. KG · 2004
- System for monitoring the status of a water softener26US 6,456,202 B2Ecowater Systems, Inc. · 2002
- Dishwashing machine with single control of additive distribution and water softener regeneration20US 4,732,171 AIndustrie Zanussi S.p.A. · 1988