B28B 21/86
Cores
Official title: Cores (in general B28B7/00)
B28B21/86 (Cores) appears on 34 US grants and 23 published applications in this corpus.
Search patents in B28B- Granted patents
- 34
- Published applications
- 23
- Assignees
- 25
- Inventors
- 63
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 0 | 0 |
| 2016 | 4 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 3 |
| 2025 | 4 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Targeted ceramic casting core inhomogeneity12 May 2026US 12,623,373 B2Rtx Corporation
- Auxetic materials and structures for ceramic matrix composite airfoil mandrels7 Oct 2025US 12,435,008 B2Rtx Corporation
- Mould core for a mould for producing hollow concrete bodies, and a moulding device having a mould core of this kind19 Aug 2025US 12,390,957 B2
- Method and device for producing concrete pile10 Jun 2025US 12,325,151 B2Giken Ltd.
- Method for CMC airfoil using core tube of rigidized ceramic fabric4 Mar 2025US 12,240,144 B2Rtx Corporation
- Method for cmc airfoil using core tube of rigidized ceramic fabric10 Sep 2026US 2026/0264289 A1Rtx Corporation
- Targeted Ceramic Casting Core Inhomogeneity6 Aug 2026US 2026/0225282 A1Rtx Corporation
- Mould core for a mould for producing hollow concrete bodies, and a moulding device having a mould core of this kind16 Oct 2025US 2025/0319630 A1
- Auxetic materials and structures for ceramic matrix composite airfoil mandrels27 Mar 2025US 2025/0100941 A1Rtx Corporation
- Method and System For Making Long SIC Tubes31 Oct 2024US 2024/0359361 A1II-Vi Delaware, Inc.
Most cited
By later US patents
- Method of forming lined pipe39US 5,028,368 AInternational Pipe Machinery Corporation · 1991
- Method of making a rigid tubular article17US 5,433,902 AMinnesota Mining and Manufacturing Company · 1995
- Mandrel for making a rigid tubular article15US 5,350,139 AMinnesota Mining and Manufacturing Company · 1994
- Mold for producing concrete pipe10US 4,614,324 ANippon Pressed Concrete Co., Ltd. · 1986
- Process for producing tubular ceramic structures of non-circular cross section10US 8,652,707 B2WATT Fuel Cell Corp. · 2014