B28B 21/70
Methods or machines specially adapted for the production of tubular articles: by
Official title: by building-up from preformed elements
B28B21/70 (Methods or machines specially adapted for the production of tubular articles: by) appears on 16 US grants and 7 published applications in this corpus.
Search patents in B28B- Granted patents
- 16
- Published applications
- 7
- Assignees
- 14
- Inventors
- 29
- Latest grant
- 24 Oct 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- CMC combustor shell with integral chutes24 Oct 2023US 11,796,174 B2ROLLS-ROYCE plc
- Exhaust subsystem with fiber pipe and method of forming fiber pipe24 May 2022US 11,339,704 B2NOVO Plastics Inc.
- Method of making ceramic composite bearings19 Nov 2019US 10,478,996 B1Lancer Systems L.P.
- Method for producing concrete pipes having a plastic inner pipe9 Apr 2019US 10,252,443 B2
- Manufacturing apparatus and method of forming a preform15 Mar 2016US 9,283,734 B2Gunite Corporation
- Cmc combustor shell with integral chutes2 Apr 2020US 2020/0103112 A1ROLLS-ROYCE plc
- Exhaust subsystem with fiber pipe and method of forming fiber pipe21 Nov 2019US 2019/0353078 A1NOVO Plastics Inc.
- Cmc combustor shell with integral chutes2 Mar 2017US 2017/0059159 A1ROLLS-ROYCE plc
- Method and mould for producing concrete pipes having a plastic inner pipe27 Dec 2012US 2012/0326353 A1
- Manufacturing Apparatus And Method Of Forming A Preform19 Jul 2012US 2012/0183707 A1Gunite Corporation
Most cited
By later US patents
- Mold for producing concrete pipe10US 4,614,324 ANippon Pressed Concrete Co., Ltd. · 1986
- Pipeline jointing9US 4,725,165 AS.E.L. Services Limited · 1988
- Bell-and-spigot concrete pipe joint with plastic liner ring8US 4,084,828 AConstruction Products Corporation · 1978
- Interlocked plastic-encased concrete pipe7US 5,573,040 APipeform LLC · 1996
- System for finishing pipes5US 4,024,006 AU.S. Concrete Pipe Co. · 1977