B29C 48/273
Using back flow
Official title: {using back flow}
B29C48/273 (Using back flow) appears on 43 US grants and 38 published applications in this corpus.
Search patents in B29C- Granted patents
- 43
- Published applications
- 38
- Assignees
- 28
- Inventors
- 60
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 3 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 3 |
| 2015 | 0 | 1 |
| 2016 | 3 | 5 |
| 2017 | 2 | 0 |
| 2018 | 2 | 3 |
| 2019 | 1 | 2 |
| 2020 | 2 | 0 |
| 2021 | 1 | 3 |
| 2022 | 1 | 4 |
| 2023 | 1 | 1 |
| 2024 | 3 | 3 |
| 2025 | 2 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filtering device for molten polymeric materials with counterflow cleaning system2 Sep 2025US 12,403,642 B2
- Candle filter support and plate assembly for polymer melts4 Mar 2025US 12,239,925 B2Westlake Longview Corporation
- Fluid filtering system with backflush valve and methods of operating the same26 Nov 2024US 12,151,187 B2Nordson Corporation
- Filter device for filtering extruded polymers and cleaning method17 Sep 2024US 12,090,425 B2Bd Plast Filtering Systems S.R.L.
- Filter device for filtering extruded polymers and cleaning method14 May 2024US 11,980,836 B2Bd Plast Filtering Systems S.R.L.
- 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
- Device for filtering a liquid plastic and corresponding operating method6 Mar 2025US 2025/0073622 A1Nordson Corporation
- Method for operating a filter device and filter device9 Jan 2025US 2025/0010224 A1Maag Germany GmbH
- Filtering device for molten polymeric materials with counterflow cleaning system14 Nov 2024US 2024/0375338 A1Break Machinery Srl
Most cited
By later US patents
- Apparatus for degassing thermoplastic synthetic plastics material30US 5,651,944 A1997
- Filtering arrangement for thermoplastics materials28US 4,332,541 AHermann Berstorff Maschinenbau GmbH · 1982
- Apparatus for filtering and extruding synthetic plastic scrap material26US 5,419,634 A1995
- Filter apparatus having filter elements shiftable between filtering and backwashing positions25US 4,752,386 AErema Engineering-Recycling · 1988
- Sieve arrangement for cleaning synthetic plastic melts24US 5,090,887 AGneuss Kunststofftechnik GmbH · 1992