B29C 48/58
Provided with seal ring elements, i.e. elements of generally circular and tapered
Official title: provided with seal ring elements, i.e. elements of generally circular and tapered shape for preventing the back flow of the melt
B29C48/58 (Provided with seal ring elements, i.e. elements of generally circular and tapered) appears on 43 US grants and 28 published applications in this corpus.
Search patents in B29C- Granted patents
- 43
- Published applications
- 28
- Assignees
- 42
- Inventors
- 106
- Latest grant
- 28 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 4 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 3 | 0 |
| 2010 | 2 | 1 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 3 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 3 | 1 |
| 2023 | 0 | 1 |
| 2024 | 2 | 2 |
| 2025 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and device for directly preparing foamed polylactic acid (PLA) product from PLA melt28 Oct 2025US 12,454,086 B2JHM Engineering and Technology (Ningbo) Co., Ltd
- Continuous dynamic and efficient devolatilization method for polymer/volatile system based on high mass transfer interfaces23 Sep 2025US 12,421,329 B1Useon Technology Limited
- Method for producing flame retardant polycarbonate resin composition pellet26 Aug 2025US 12,397,475 B2Mitsubishi Engineering-Plastics Corporation
- Composite material manufacturing equipments1 Oct 2024US 12,103,251 B2Enerage Inc.
- Multi-screw kneader and method for producing nano-composite using said multi-screw kneader, and disk-shaped segment used for said kneader and said method26 Mar 2024US 11,938,657 B2The Doshisha
- Device and method for processing plastics material3 Oct 2024US 2024/0326312 A1Coperion GmbH
- Composite material manufacturing equipments7 Mar 2024US 2024/0075696 A1Enerage Inc.
- Method for producing flame retardant polycarbonate resin composition pellet18 May 2023US 2023/0150171 A1Mitsubishi Engineering-Plastics Corporation
- Method and device for directly preparing foamed polylactic acid (pla) product from pla melt31 Mar 2022US 2022/0097274 A1Chtc Bio-Based Material Engineering & Technology (Ningbo) Co., Ltd.
- Extruder screw, extrusion device having an extruder screw and method for plasticizing a plastic30 Dec 2021US 2021/0402358 A1Kraussmaffei Extrusion GmbH
Most cited
By later US patents
- Apparatus for treating cellulosic materials110US 6,176,176 B1Board of Trustees operating Michigan State University · 2001
- Process for treating cellulosic materials101US 6,106,888 ABoard of Trustees operating Michigan State University · 2000
- Material-processing screw machine48US 4,600,311 AClextral · 1986
- Plastic extrusion and apparatus36US 4,118,163 AOwens-Illinois, Inc. · 1978
- Apparatus and method for extracting fluid from an extruded material30US 4,446,094 AWelding Engineers, Inc. · 1984