B28B 21/82
Built-up from several parts
Official title: built-up from several parts; Multiple moulds; Moulds with adjustable parts
B28B21/82 (Built-up from several parts) appears on 18 US grants and 15 published applications in this corpus.
Search patents in B28B- Granted patents
- 18
- Published applications
- 15
- Assignees
- 14
- Inventors
- 29
- Latest grant
- 10 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method and device for producing concrete pile10 Jun 2025US 12,325,151 B2Giken Ltd.
- Devices and processes for making concrete articles29 Nov 2022US 11,511,460 B2
- Devices and processes for making concrete articles7 Jul 2020US 10,703,013 B2
- Devices and processes for making concrete articles3 Dec 2019US 10,493,656 B2
- Production of a tower3 Jan 2017US 9,533,428 B2Wobben Properties GmbH
- Method and device for producing concrete pile17 Nov 2022US 2022/0362967 A1Giken Ltd.
- Devices and Processes for Making Concrete Articles27 Aug 2020US 2020/0269467 A1
- Devices and Processes for Making Concrete Articles7 Nov 2019US 2019/0337187 A1
- Devices and Processes for Making Concrete Articles2 Aug 2018US 2018/0215072 A1
- Hollow structure, and preparation method thereof30 Apr 2015US 2015/0113913 A1Ajou University Industry-Academic Cooperation Foundation
Most cited
By later US patents
- Hollow structure, and preparation method thereof9US 9,267,286 B2Ajou University Industry-Academic Cooperation Foundation · 2016
- Apparatus for actuating inner and outer forms of a concrete pipe forming mold8US 4,153,232 AC.S. Johnson Company · 1979
- Modular sleeve for protecting, repairing or renovating a pipe6US 5,988,224 A3X Engineering · 1999
- Plural molds with common actuating means5US 4,134,568 AHydrotile Canada Limited · 1979
- Manufacture of short pipes5US 4,151,246 AVianini Pipes (Proprietary) Limited · 1979