B28B 21/42
Methods or machines specially adapted for the production of tubular articles: by
Official title: by shaping on or against mandrels or like moulding surfaces
B28B21/42 (Methods or machines specially adapted for the production of tubular articles: by) appears on 53 US grants and 37 published applications in this corpus.
Search patents in B28B- Granted patents
- 53
- Published applications
- 37
- Assignees
- 34
- Inventors
- 86
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 3 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 1 | 3 |
| 2013 | 2 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 4 | 2 |
| 2017 | 2 | 1 |
| 2018 | 2 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 5 |
| 2023 | 0 | 1 |
| 2024 | 2 | 4 |
| 2025 | 2 | 1 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Support structure and method of forming a support structure19 May 2026US 12,631,013 B2HC Properties Inc.
- Multi-mandrel braiding process3 Mar 2026US 12,565,451 B2Rtx Corporation
- Methods for complex geometry mandrel removal of ceramic matrix composite components20 Jan 2026US 12,528,228 B2Rtx Corporation
- Method for CMC airfoil using core tube of rigidized ceramic fabric4 Mar 2025US 12,240,144 B2Rtx Corporation
- Pipe forming apparatus4 Feb 2025US 12,214,559 B2Nexgen Pipes Pte. Ltd.
- Methods and systems for commercially producing tubular solid oxide fuel cells1 Oct 2026US 2026/0302269 A1WATT Fuel Cell Corp.
- Method for cmc airfoil using core tube of rigidized ceramic fabric10 Sep 2026US 2026/0264289 A1Rtx Corporation
- Multi-mandrel braiding process27 Feb 2025US 2025/0066259 A1Rtx Corporation
- Powder press and method for powder-pressing a powder-pressed part26 Dec 2024US 2024/0424554 A1Dorst Technologies GmbH & Co. KG
- Method and System For Making Long SIC Tubes31 Oct 2024US 2024/0359361 A1II-Vi Delaware, Inc.
Most cited
By later US patents
- Method of producing patterned shaped article34US 5,445,772 ACCA Inc. · 1995
- Concrete foundation pile and device for driving the same into the ground29US 4,708,530 A1987
- Process for manufacturing a ceramic hollow body21US 4,460,529 ALanglet Weber KG · 1984
- Method of manufacturing a metal matrix composite17US 7,793,703 B2Century, LLC · 2010
- Ceramic tile insulation for gas turbine component16US 7,198,860 B2Siemens Power Generation, Inc. · 2007