B28B 21/16
One or more mould elements
Official title: one or more mould elements
B28B21/16 (One or more mould elements) appears on 15 US grants and 8 published applications in this corpus.
Search patents in B28B- Granted patents
- 15
- Published applications
- 8
- Assignees
- 8
- Inventors
- 23
- Latest grant
- 29 Nov 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 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 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Method for manufacturing of ceramic electro-insulating pipes26 Apr 2016US 9,321,188 B2Industry Technologies S.A
- Vibration system for concrete pipe making machines1 Aug 2006US 7,083,406 B2Hawkeye Concrete Products Co.
- Core wall-thinning design method for prestressed high-performance concrete cylinder pipe22 Jan 2026US 2026/0022072 A1Zhengzhou University
- Bellpacker vibration assembly15 Feb 2024US 2024/0051180 A1Besser Company
- Bellpacker vibration assembly1 Jun 2023US 2023/0167649 A1
- Devices and Processes for Making Concrete Articles27 Aug 2020US 2020/0269467 A1
- Devices and Processes for Making Concrete Articles7 Nov 2019US 2019/0337187 A1
Most cited
By later US patents
- Concrete pipe making machine18US 4,708,621 AHawkeye Concrete Products Co. · 1987
- Vibratory concrete pipe forming apparatus and method12US 4,756,861 A1988
- Method of making concrete pipe7US 4,039,642 A1977
- Process and device for production of concrete pipe by filling and compaction of fresh concrete in an upright form7US 4,342,713 AAB Skanska Cementgjunteriet · 1982
- Method and apparatus for making concrete pipe6US 4,041,118 AAtlantic Pipe Corporation · 1977