B21D 51/44
Making closures
Official title: Making closures, e.g. caps (folded of thin metal foils in the way of making paper caps B31D5/00; making closures in conjunction with applying same B67B)
B21D51/44 (Making closures) appears on 330 US grants and 257 published applications in this corpus.
Search patents in B21D- Granted patents
- 330
- Published applications
- 257
- Assignees
- 165
- Inventors
- 540
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 11 | 0 |
| 1984 | 3 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 4 | 0 |
| 1988 | 7 | 0 |
| 1989 | 10 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 1 |
| 2003 | 2 | 2 |
| 2004 | 4 | 2 |
| 2005 | 0 | 5 |
| 2006 | 2 | 3 |
| 2007 | 0 | 5 |
| 2008 | 3 | 8 |
| 2009 | 4 | 7 |
| 2010 | 7 | 14 |
| 2011 | 5 | 5 |
| 2012 | 8 | 13 |
| 2013 | 6 | 14 |
| 2014 | 11 | 13 |
| 2015 | 5 | 19 |
| 2016 | 12 | 15 |
| 2017 | 14 | 19 |
| 2018 | 12 | 14 |
| 2019 | 14 | 19 |
| 2020 | 13 | 14 |
| 2021 | 15 | 13 |
| 2022 | 9 | 13 |
| 2023 | 8 | 11 |
| 2024 | 7 | 9 |
| 2025 | 13 | 4 |
| 2026 | 5 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Metallic overcap with latches11 Aug 2026US 12,703,545 B2Modulo Embalagens Industria E Comercio Ltda
- Apparatus for the production of tear-off lids23 Jun 2026US 12,661,705 B2Soudronic AG
- Method for manufacturing a capsule made of aluminum for small tubes with open hole and product so obtained23 Jun 2026US 12,662,290 B2D.B.N. Tubetti S.R.L.
- Can shell, and associated tooling and method19 May 2026US 12,629,744 B2Stolle Machinery Company, LLC
- Press system and shell feeding assembly therefor7 Apr 2026US 12,594,591 B2Stolle Machinery Company, LLC
- Drive assemblies for shell stock feeder assemblies and methods of feeding material into shell presses27 Aug 2026US 2026/0249344 A1Stolle Machinery Company, LLLC
- System and method for a single press for manufacturing a finished can end13 Aug 2026US 2026/0233290 A1Drt Mfg. Co., LLC
- System and a method for manufacturing screw caps from cardboard or paperboard13 Aug 2026US 2026/0233485 A1Länsipahvi Oy
- Press system and shell feeding assembly therefor23 Jul 2026US 2026/0208257 A1Stolle Machinery Company, LLC
- Can shell, and associated tooling and method25 Jun 2026US 2026/0176018 A1Stolle Machinery Company, LLC
Most cited
By later US patents
- Method and apparatus for forming container end panels89US 4,808,052 ARedicon Corporation · 1989
- Method of and apparatus for forming a reinforced can end83US 4,571,978 AMetal Box Limited · 1986
- Method of reforming a can end77US 4,031,837 AAluminum Company of America · 1977
- Metallic beverage can end with improved chuck wall and countersink76US 7,100,789 B2Ball Corporation · 2006
- Method and apparatus for forming container end panels75US 4,716,755 ARedicon Corporation · 1988