B29C 44/581
Closure devices for pour holes
Official title: {Closure devices for pour holes}
B29C44/581 (Closure devices for pour holes) appears on 49 US grants and 21 published applications in this corpus.
Search patents in B29C- Granted patents
- 49
- Published applications
- 21
- Assignees
- 34
- Inventors
- 67
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 3 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 4 | 3 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 2 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 3 | 2 |
| 2018 | 1 | 2 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a foam-backed moulded component, and moulded component17 Mar 2026US 12,576,564 B2
- Injection molding system and injection molding method1 Jul 2025US 12,343,909 B2Otrajet Inc.
- Injection molding system and injection molding method1 Aug 2023US 11,712,826 B2Otrajet Inc.
- Microwave-transmitting mould structure and method for using the same18 Oct 2022US 11,472,073 B2Sunko Ink Co., Ltd.
- Expanded foam-filled building panel10 Dec 2019US 10,500,772 B2
- Method for Producing a Foam-Backed Moulded Component, and Moulded Component2 Jan 2025US 2025/0001656 A1
- Injection molding system and injection molding method5 Oct 2023US 2023/0311378 A1Otrajet Inc.
- Microwave-transmitting mould structure and method for using the same21 Jan 2021US 2021/0016475 A1Sunko Ink Co., Ltd.
- Injection molding system and injection molding method14 Jan 2021US 2021/0008767 A1Otrajet Inc.
- Chemical resistant composite support pad29 Aug 2019US 2019/0263025 A1
Most cited
By later US patents
- Golf club head64US 5,178,392 ATaylor Made Golf Company, Inc. · 1993
- Filler plug51US 4,053,084 AIllinois Tool Works Inc. · 1977
- Heat shrinkable member35US 6,355,318 B1Shawcor Ltd. · 2002
- Closure plug26US 4,037,754 ATRW Inc. · 1977
- Nozzle for injection molding machines24US 4,990,083 AKnoFerromatik Desma GmbH · 1991