B28B 21/58
Steel tubes
B28B21/58 (Steel tubes) appears on 5 US grants and 3 published applications in this corpus.
Search patents in B28B- Granted patents
- 5
- Published applications
- 3
- Assignees
- 6
- Inventors
- 7
- Latest grant
- 17 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 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 | 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 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 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 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Pre-stressed concrete pipe17 Jan 2023US 11,555,562 B1
- Liner for concrete article28 Mar 2017US 9,605,777 B2Hawkeyepedershaab Concrete Technologies, Inc.
- Vibration-resistant reinforced concrete watertight pipe and method of manufacturing the same7 Jan 2014US 8,622,093 B2Sun-Am R&D Co., Ltd.
- Method of forming the primary core of a prestressed concrete pipe15 Jul 1986US 4,600,548 AVinen Corp.
- Method of casting beveled pipe18 Jul 1978US 4,101,622 AAmeron, Inc.
- Recess former and anchor assembly4 Jul 2024US 2024/0217137 A1Leviat Pty Ltd
- Liner for concrete article19 Nov 2015US 2015/0330535 A1Hawkeye Concrete Products Co.
- Vibration-resistant reinforced concrete watertight pipe and method of manufacturing the same12 May 2011US 2011/0108151 A1Sun-Am R&D Co., Ltd.
Most cited
By later US patents