B28B 21/88
Adjustable, collapsible or expansible
Official title: adjustable, collapsible or expansible (using inflatable cores B28B21/20 {; for compacting B28B21/18})
B28B21/88 (Adjustable, collapsible or expansible) appears on 23 US grants and 15 published applications in this corpus.
Search patents in B28B- Granted patents
- 23
- Published applications
- 15
- Assignees
- 16
- Inventors
- 44
- Latest grant
- 7 Oct 2025
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 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- 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.
- Flared mandrel and process for effective use in transition regions23 Apr 2024US 11,965,430 B1Rtx Corporation
- Method of making ceramic composite bearings19 Nov 2019US 10,478,996 B1Lancer Systems L.P.
- 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.
- Mould core for a mould for producing hollow concrete bodies, and a moulding device having a mould core of this kind11 May 2023US 2023/0146450 A1
- Method and device for producing concrete pile17 Nov 2022US 2022/0362967 A1Giken Ltd.
Most cited
By later US patents
- Method of forming lined pipe39US 5,028,368 AInternational Pipe Machinery Corporation · 1991
- Process for producing tubular ceramic structures of non-circular cross section10US 8,652,707 B2WATT Fuel Cell Corp. · 2014
- Apparatus for actuating inner and outer forms of a concrete pipe forming mold8US 4,153,232 AC.S. Johnson Company · 1979
- Hollow formwork elements for producing concrete structures5US 3,973,749 ASemperit Aktiengesellschaft · 1976
- Core means having a rubber liner5US 4,003,545 A1977