B31B 2170/20
Construction of flexible containers: having multi-layered walls
Official title: having multi-layered walls, e.g. laminated or lined
B31B2170/20 (Construction of flexible containers: having multi-layered walls) appears on 447 US grants and 417 published applications in this corpus.
Search patents in B31B- Granted patents
- 447
- Published applications
- 417
- Assignees
- 242
- Inventors
- 731
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 3 | 0 |
| 1990 | 8 | 0 |
| 1991 | 7 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 12 | 0 |
| 1998 | 14 | 0 |
| 1999 | 11 | 0 |
| 2000 | 13 | 0 |
| 2001 | 9 | 3 |
| 2002 | 12 | 11 |
| 2003 | 6 | 10 |
| 2004 | 4 | 12 |
| 2005 | 2 | 9 |
| 2006 | 6 | 12 |
| 2007 | 3 | 9 |
| 2008 | 6 | 8 |
| 2009 | 7 | 4 |
| 2010 | 6 | 16 |
| 2011 | 3 | 15 |
| 2012 | 6 | 18 |
| 2013 | 13 | 20 |
| 2014 | 11 | 24 |
| 2015 | 9 | 19 |
| 2016 | 16 | 18 |
| 2017 | 12 | 22 |
| 2018 | 11 | 16 |
| 2019 | 13 | 17 |
| 2020 | 20 | 28 |
| 2021 | 15 | 15 |
| 2022 | 13 | 27 |
| 2023 | 15 | 29 |
| 2024 | 28 | 29 |
| 2025 | 22 | 14 |
| 2026 | 11 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and machine for manufacturing a flexible envelope-like bag, particularly with reinforcement29 Sep 2026US 12,747,068 B2Holweg Group
- Easy open plastic bags22 Sep 2026US 12,741,786 B2Polytex Fibers Corporation
- Flexible bag having a convertible bottom, method and machine for manufacturing same25 Aug 2026US 12,715,657 B2Holweg Group
- Stitchless bulk bag including a baffle insert and method of production21 Jul 2026US 12,686,556 B1Ameriglobe, LLC
- Packaging with multi-ply walls14 Jul 2026US 12,679,062 B2Pregis LLC
- Cushion sheet production module and packaging bag production device thereof16 Jul 2026US 2026/0200640 A1Beta (Shenzhen) Package Products Co., Ltd
- Spouted packaging bag and method for producing spouted packaging bag16 Jul 2026US 2026/0200654 A1Toppan Holdings Inc.
- Web superposing device and bag making apparatus18 Jun 2026US 2026/0166772 A1Totani Corporation
- Vertical bagger using web-alignment score11 Jun 2026US 2026/0159260 A1Pregis LLC
- Apparatus and method for making a pouch package4 Jun 2026US 2026/0151980 A1Ranpak Corp.
Most cited
By later US patents
- Flexible disposable material for forming a food container for microwave cooking219US 4,890,439 AJames River Corporation · 1990
- Flexible, multiple-compartment drug container and method of making and using same132US 5,944,709 AB. Braun Medical Inc. · 1999
- Stand-up plastic bag and method of making same130US 4,837,849 AThe Dow Chemical Company · 1989
- Composite packaging material having an expanded sheet with a separator sheet104US 5,688,578 A1997
- Method and apparatus for manufacturing packaging pads102US 4,720,321 AKeyes Fibre Company · 1988