B29C 48/64
Screws with two or more threads
B29C48/64 (Screws with two or more threads) appears on 204 US grants and 157 published applications in this corpus.
Search patents in B29C- Granted patents
- 204
- Published applications
- 157
- Assignees
- 141
- Inventors
- 426
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 2 |
| 2002 | 3 | 4 |
| 2003 | 2 | 3 |
| 2004 | 5 | 7 |
| 2005 | 4 | 4 |
| 2006 | 7 | 6 |
| 2007 | 3 | 1 |
| 2008 | 1 | 3 |
| 2009 | 5 | 6 |
| 2010 | 5 | 9 |
| 2011 | 2 | 17 |
| 2012 | 5 | 13 |
| 2013 | 3 | 8 |
| 2014 | 8 | 10 |
| 2015 | 11 | 8 |
| 2016 | 6 | 1 |
| 2017 | 9 | 8 |
| 2018 | 5 | 4 |
| 2019 | 5 | 8 |
| 2020 | 4 | 8 |
| 2021 | 5 | 5 |
| 2022 | 10 | 1 |
| 2023 | 4 | 9 |
| 2024 | 0 | 4 |
| 2025 | 7 | 6 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Extruder comprising a particular arrangement of asymmetrical screw elements on screw shafts2 Jun 2026US 12,643,276 B2Covestro Deutschland AG
- Screw for direct molding, injection molding apparatus, and kneading piece12 May 2026US 12,623,384 B2The Japan Steel Works, Ltd.
- No solid bed extruder screw with varying width sub-channels28 Oct 2025US 12,454,089 B2
- Resin composition, resin-coating material, insulated wire, vehicle wire harness, and method of producing insulated wire to be used in vehicle wire harness14 Oct 2025US 12,441,874 B2Furukawa Automotive Systems Inc.
- Twin-screw extrusion device and processing method therefor30 Sep 2025US 12,427,707 B2Wuyi University
- Screw elements with improved mixing effect and improved heat transfer, and the use of same24 Sep 2026US 2026/0284952 A1Covestro Deutschland AG
- 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
- Fluorine free polymer processing aids4 Dec 2025US 2025/0368810 A1
- Screw for direct molding, injection molding apparatus, and kneading piece6 Nov 2025US 2025/0340003 A1The Japan Steel Works, Ltd.
- Twin-screw extrusion device and processing method therefor7 Aug 2025US 2025/0249635 A1Wuyi University
Most cited
By later US patents
- Degassing of flowable masses in a multiple-screw extruder47US 7,654,725 B2Buhler AG · 2010
- Extrusion apparatus and method45US 4,173,417 AHPM Corporation · 1979
- Method and apparatus for increasing the intrinsic viscosity of a polycondensate melt44US 9,908,263 B2Next Generation Recyclingmaschinen GmbH · 2018
- Apparatus for working rubber compounds43US 4,227,870 AThe B. F. Goodrich Company · 1980
- Extruder with short cycle multichannel wave screw40US 4,277,182 AHPM Corporation · 1981