B21D 51/14
Flattening hollow objects for transport or storage
Official title: Flattening hollow objects for transport or storage; Re-forming same (making tubes from doubled flat material B21C37/14)
B21D51/14 (Flattening hollow objects for transport or storage) appears on 7 US grants and 2 published applications in this corpus.
Search patents in B21D- Granted patents
- 7
- Published applications
- 2
- Assignees
- 2
- Inventors
- 7
- Latest grant
- 1 Sep 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 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 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Forged sideways extrusion1 Sep 2015US 9,120,138 B2The National Machinery Company
- Method and intermediate product for producing a hollow body and a hollow body produced by said method6 May 2003US 6,557,233 B1Alcan International Limited
- Pipe stretching apparatus14 Feb 1989US 4,803,881 A
- Duct-shaping machine and method25 Feb 1986US 4,571,980 A
- Apparatus and process for nesting drum bodies8 Nov 1983US 4,413,400 A
Most cited
By later US patents
- Pipe stretching apparatus13US 4,803,881 A1989
- Duct-shaping machine and method9US 4,571,980 A1986
- Apparatus and method for re-forming and maintaining the circular shape of a deformed roll of material5US 3,961,516 A1976
- Method and intermediate product for producing a hollow body and a hollow body produced by said method3US 6,557,233 B1Alcan International Limited · 2003
- Apparatus and process for nesting drum bodies2US 4,413,400 A1983