B29C 48/505
Screws
B29C48/505 (Screws) appears on 1,375 US grants and 1,164 published applications in this corpus.
Search patents in B29C- Granted patents
- 1,375
- Published applications
- 1,164
- Assignees
- 761
- Inventors
- 2,833
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 19 | 0 |
| 1978 | 23 | 0 |
| 1979 | 16 | 0 |
| 1980 | 17 | 0 |
| 1981 | 15 | 0 |
| 1982 | 16 | 0 |
| 1983 | 15 | 0 |
| 1984 | 15 | 0 |
| 1985 | 12 | 0 |
| 1986 | 10 | 0 |
| 1987 | 16 | 0 |
| 1988 | 22 | 0 |
| 1989 | 26 | 0 |
| 1990 | 32 | 0 |
| 1991 | 25 | 0 |
| 1992 | 32 | 0 |
| 1993 | 24 | 0 |
| 1994 | 28 | 0 |
| 1995 | 14 | 0 |
| 1996 | 21 | 0 |
| 1997 | 23 | 0 |
| 1998 | 45 | 0 |
| 1999 | 32 | 0 |
| 2000 | 40 | 0 |
| 2001 | 33 | 5 |
| 2002 | 25 | 34 |
| 2003 | 22 | 36 |
| 2004 | 31 | 33 |
| 2005 | 16 | 35 |
| 2006 | 28 | 28 |
| 2007 | 16 | 43 |
| 2008 | 13 | 41 |
| 2009 | 23 | 48 |
| 2010 | 24 | 64 |
| 2011 | 17 | 56 |
| 2012 | 34 | 69 |
| 2013 | 28 | 57 |
| 2014 | 47 | 67 |
| 2015 | 62 | 63 |
| 2016 | 49 | 45 |
| 2017 | 41 | 56 |
| 2018 | 34 | 44 |
| 2019 | 32 | 44 |
| 2020 | 34 | 47 |
| 2021 | 35 | 46 |
| 2022 | 54 | 52 |
| 2023 | 39 | 46 |
| 2024 | 25 | 44 |
| 2025 | 36 | 36 |
| 2026 | 19 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B29C 48/57Provided with kneading disc-like elements282
- B29C 48/53Having a varying channel depth234
- B29C 48/67Having incorporated mixing devices not provided for in groups b29c48/52 - b29c48/66228
- B29C 48/64Screws with two or more threads204
- B29C 48/625Characterised by the ratio of the threaded length of the screw to197
- B29C 48/535With thread pitch varying along the longitudinal axis187
- B29C 48/52With an outer diameter varying along the longitudinal axis149
- B29C 48/56Having grooves or cavities other than the thread or the channel119
All 20 subgroupsShow fewer
- B29C 48/507Characterised by the material or their manufacturing process115
- B29C 48/55Having reverse-feeding elements112
- B29C 48/59Characterised by details of the thread, i.e. the shape of a single112
- B29C 48/54With additional forward-feeding elements111
- B29C 48/565Having projections other than the thread109
- B29C 48/51With internal flow passages95
- B29C 48/63Having sections without mixing elements or threads, i.e. having cylinder shaped sections72
- B29C 48/575Provided with elements of a generally circular cross-section for shearing the melt52
- B29C 48/58Provided with seal ring elements, i.e. elements of generally circular and tapered43
- B29C 48/62Characterised by the shape of the thread channel39
- B29C 48/585Provided with gears interacting with the flow31
- B29C 48/635Eccentrically rotating screws14
Recent patents
- Screw having a web formed undercut for an extruder or conveyor1 Sep 2026US 12,722,129 B2EREMA Engineering Recycling Maschinen und Anlagen Gesellschaft m.b.H.
- Screw and twin-screw assembly for use in elastomer mixture extruders and associated method for extrusion of elastomer mixtures11 Aug 2026US 12,703,137 B2Pomini Rubber & Plastics S.r.l.
- Ultrasonically assisted polymer extrusion30 Jun 2026US 12,668,011 B2
- 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
- Screw elements with improved mixing effect and improved heat transfer, and the use of same24 Sep 2026US 2026/0284952 A1Covestro Deutschland AG
- Extruder10 Sep 2026US 2026/0264306 A1The Japan Steel Works, Ltd.
- Miniaturized volumetric extruder using twin conical screws, each provided with a thread, the pitch of which increases to maintain a constant displacement23 Jul 2026US 2026/0208423 A1Compagnie Generale Des Etablissements Michelin
- Extruder16 Jul 2026US 2026/0200159 A1The Japan Steel Works, Ltd.
- Silicone manufacturing9 Jul 2026US 2026/0193416 A1Dow Global Technologies LLC
Most cited
By later US patents
- High-precision modeling filament153US 7,122,246 B2Stratasys, Inc. · 2006
- Fiber reinforced thermoplastic resin structure, process for production of same, and extruder for production of same148US 5,679,456 AToray Industries, Inc. · 1997
- Conical logarithmic spiral viscosity pump144US 5,312,224 AInternational Business Machines Corporation · 1994
- Method and apparatus for extruding bingham plastic-type materials134US 5,304,331 AMinnesota Mining and Manufacturing Company · 1994
- Fiber reinforced thermoplastic resin structure, process for production of same, and extruder for production of same126US 5,824,410 AToray Industries, Inc. · 1998