B29C 48/691
Arrangements for replacing filters
Official title: Arrangements for replacing filters, e.g. with two parallel filters for alternate use
B29C48/691 (Arrangements for replacing filters) appears on 167 US grants and 99 published applications in this corpus.
Search patents in B29C- Granted patents
- 167
- Published applications
- 99
- Assignees
- 92
- Inventors
- 233
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 11 | 0 |
| 2002 | 7 | 2 |
| 2003 | 6 | 2 |
| 2004 | 0 | 4 |
| 2005 | 2 | 3 |
| 2006 | 3 | 3 |
| 2007 | 2 | 2 |
| 2008 | 2 | 7 |
| 2009 | 1 | 3 |
| 2010 | 1 | 4 |
| 2011 | 3 | 5 |
| 2012 | 3 | 0 |
| 2013 | 2 | 7 |
| 2014 | 3 | 6 |
| 2015 | 2 | 5 |
| 2016 | 4 | 6 |
| 2017 | 2 | 2 |
| 2018 | 3 | 4 |
| 2019 | 2 | 7 |
| 2020 | 6 | 2 |
| 2021 | 4 | 4 |
| 2022 | 3 | 6 |
| 2023 | 4 | 5 |
| 2024 | 4 | 3 |
| 2025 | 6 | 4 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter device for PVC plastic melt for connection to a twin screw extruder and twin screw extruder for PVC processing21 Jul 2026US 12,686,158 B2Gneuss GmbH
- Screw machine with a rotatable filter in a deaeration port4 Nov 2025US 12,459,185 B2Shibaura Machine Co., Ltd.
- Method and device for directly preparing foamed polylactic acid (PLA) product from PLA melt28 Oct 2025US 12,454,086 B2JHM Engineering and Technology (Ningbo) Co., Ltd
- Apparatus for filtering a fluid, in particular a plastic melt having impurities, and a valve arrangement for such a fluid3 Jun 2025US 12,318,712 B2Nordson Corporation
- Candle filter support and plate assembly for polymer melts4 Mar 2025US 12,239,925 B2Westlake Longview Corporation
- Filter assembly3 Sep 2026US 2026/0257414 A1Maag Germany GmbH
- Filtering Apparatus28 May 2026US 2026/0145105 A1Maag Germany GmbH
- Filtering device for filtering a fluid and a method for venting and backflushing1 Jan 2026US 2026/0001266 A1Nordson Corporation
- Method for operating a filter device and filter device14 Aug 2025US 2025/0256227 A1Maag Germany GmbH
- Throttle grooves and control loop/method to achieve an optimized pressure constant backflush procedure of the screen cavity of a screen changer during backflush19 Jun 2025US 2025/0196422 A1Nordson Corporation
Most cited
By later US patents
- Process and apparatus for forming plastic sheet54US 6,183,829 B2Rohm and Haas Company · 2001
- Screen changer36US 3,962,092 AThe Dow Chemical Company · 1976
- Filter screen exchanging apparatus for plastic extruder33US 4,167,384 AThe Japan Steel Works, Ltd. · 1979
- Filtering arrangement for thermoplastics materials28US 4,332,541 AHermann Berstorff Maschinenbau GmbH · 1982
- Slide filters26US 4,059,525 A1977