B29B 7/429
Screws
Official title: {Screws (B29B7/421 takes precedence)}
B29B7/429 (Screws) appears on 192 US grants and 144 published applications in this corpus.
Search patents in B29B- Granted patents
- 192
- Published applications
- 144
- Assignees
- 122
- Inventors
- 348
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 3 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 5 |
| 2005 | 3 | 3 |
| 2006 | 2 | 5 |
| 2007 | 3 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 6 |
| 2013 | 1 | 5 |
| 2014 | 5 | 5 |
| 2015 | 4 | 8 |
| 2016 | 5 | 11 |
| 2017 | 11 | 16 |
| 2018 | 4 | 9 |
| 2019 | 8 | 10 |
| 2020 | 8 | 14 |
| 2021 | 6 | 9 |
| 2022 | 17 | 15 |
| 2023 | 9 | 8 |
| 2024 | 4 | 3 |
| 2025 | 8 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for the production of a rubber compound used for the manufacture of an article made from rubber or a pneumatic tire technical sector31 Mar 2026US 12,589,523 B2
- Micronizing apparatus for hydrogel of super absorbent polymer13 Jan 2026US 12,521,726 B2LG Chem.Ltd.
- Feeding screw machine for feeding a processing screw machine14 Oct 2025US 12,440,814 B2Coperion GmbH
- Kneading method for use with kneading apparatus with first and second extruders2 Sep 2025US 12,403,628 B2HSP Technologies Inc.
- Asymmetrical three-blade screw-type shaft for a mixing and kneading machine3 Jun 2025US 12,318,744 B2Buss AG
- Device and method for processing materials5 Jun 2025US 2025/0178241 A1EREMA Engineering Recycling Maschinen und Anlagen Gesellschaft m.b.H.
- Micronizing Apparatus for Hydrogel of Super Absorbent Polymer9 Jan 2025US 2025/0010271 A1LG Chem.Ltd.
- Particulate water absorbent, absorbent body containing water absorbent, and absorbent article using absorbent body12 Sep 2024US 2024/0299907 A1Nippon Shokubai Co., Ltd.
- Treatment element for treating material by means of a screw machine8 Feb 2024US 2024/0042649 A1Coperion GmbH
- Material supply device and plasticizing apparatus25 Jan 2024US 2024/0025081 A1Seiko Epson Corporation
Most cited
By later US patents
- Extruder assembly for extruding water-curable silane modified polymers54US 4,564,349 AUnion Carbide Corporation · 1986
- Method and extrusion apparatus for degassing thermoplastic plastics material melts53US 4,902,455 AHermann Berstorff Maschinenbau GmbH · 1990
- Satellite extruder arrangement and method for the addition of an additive in a polymer melt within a dynamic mixer46US 5,951,159 A1999
- Method and apparatus for increasing the intrinsic viscosity of a polycondensate melt44US 9,908,263 B2Next Generation Recyclingmaschinen GmbH · 2018
- Extrusion device43US 3,941,535 A1976