B29C 48/251
Design of extruder parts
Official title: {Design of extruder parts, e.g. by modelling based on mathematical theories or experiments}
B29C48/251 (Design of extruder parts) appears on 94 US grants and 119 published applications in this corpus.
Search patents in B29C- Granted patents
- 94
- Published applications
- 119
- Assignees
- 74
- Inventors
- 232
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 2 |
| 2003 | 0 | 0 |
| 2004 | 1 | 3 |
| 2005 | 2 | 5 |
| 2006 | 2 | 2 |
| 2007 | 2 | 0 |
| 2008 | 1 | 2 |
| 2009 | 1 | 4 |
| 2010 | 2 | 5 |
| 2011 | 1 | 11 |
| 2012 | 3 | 10 |
| 2013 | 4 | 7 |
| 2014 | 5 | 3 |
| 2015 | 3 | 10 |
| 2016 | 4 | 6 |
| 2017 | 6 | 9 |
| 2018 | 10 | 4 |
| 2019 | 8 | 6 |
| 2020 | 6 | 4 |
| 2021 | 3 | 4 |
| 2022 | 6 | 2 |
| 2023 | 4 | 4 |
| 2024 | 0 | 6 |
| 2025 | 2 | 5 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for supporting molding of pulverized material resin material16 Jun 2026US 12,654,377 B2Nissei Plastic Industrial Co., Ltd.
- Extruder comprising a particular arrangement of asymmetrical screw elements on screw shafts2 Jun 2026US 12,643,276 B2Covestro Deutschland AG
- Intermittent extrusion system and extrusion device19 May 2026US 12,629,877 B2Wuyi University
- Air ring for blown-film extrusion apparatus16 Sep 2025US 12,415,304 B2
- Screw element having an axially asymmetrical screw profile which has at least two construction points located within the screw profile29 Jul 2025US 12,370,510 B2Covestro Intellectual Property GmbH & Co.KG
- Screw elements with improved mixing effect and improved heat transfer, and the use of same24 Sep 2026US 2026/0284952 A1Covestro Deutschland AG
- Component for an extrusion line13 Aug 2026US 2026/0233451 A1Battenfeld-Cincinnati Germany GmbH
- Biodegradable sheets23 Apr 2026US 2026/0109100 A1
- Advanced visco-seals for single screw extruders12 Feb 2026US 2026/0042250 A1Dow Global Technologies LLC
- Intermittent extrusion system and extrusion device2 Oct 2025US 2025/0303626 A1Wuyi University
Most cited
By later US patents
- Degassing of flowable masses in a multiple-screw extruder47US 7,654,725 B2Buhler AG · 2010
- Mixing apparatus and methods43US 4,752,135 ABaker Perkins Inc. · 1988
- Co-rotating twin-screw kneaders with kneading disks32US 4,824,256 AWerner & Pfleiderer · 1989
- Method for designing a profile extrusion die plate29US 5,608,637 AGeneral Electric Company · 1997
- Multi-screw, extrusion-compounding machine with modular mixing elements24US 5,487,602 AFarrel Corporation · 1996