B31B 70/8131
Making bags having interengaging closure elements
Official title: {Making bags having interengaging closure elements}
B31B70/8131 (Making bags having interengaging closure elements) appears on 576 US grants and 510 published applications in this corpus.
Search patents in B31B- Granted patents
- 576
- Published applications
- 510
- Assignees
- 156
- Inventors
- 548
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 8 | 0 |
| 1987 | 14 | 0 |
| 1988 | 4 | 0 |
| 1989 | 15 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 9 | 0 |
| 1999 | 17 | 0 |
| 2000 | 27 | 0 |
| 2001 | 18 | 19 |
| 2002 | 27 | 32 |
| 2003 | 37 | 47 |
| 2004 | 27 | 67 |
| 2005 | 39 | 39 |
| 2006 | 28 | 28 |
| 2007 | 31 | 27 |
| 2008 | 22 | 22 |
| 2009 | 12 | 24 |
| 2010 | 13 | 30 |
| 2011 | 10 | 10 |
| 2012 | 14 | 21 |
| 2013 | 10 | 5 |
| 2014 | 10 | 12 |
| 2015 | 6 | 9 |
| 2016 | 8 | 9 |
| 2017 | 3 | 17 |
| 2018 | 6 | 12 |
| 2019 | 10 | 10 |
| 2020 | 8 | 8 |
| 2021 | 10 | 11 |
| 2022 | 10 | 13 |
| 2023 | 11 | 13 |
| 2024 | 12 | 10 |
| 2025 | 9 | 9 |
| 2026 | 0 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Zipper tape-equipped bag body, article housing method for zipper tape-equipped bag body, manufacturing method for zipper tape-equipped bag body, and manufacturing device for zipper tape-equipped bag body18 Nov 2025US 12,472,718 B2Idemitsu Unitech Co., Ltd.
- Four side seal packaging bag and preparation device and method thereof16 Sep 2025US 12,415,328 B2Shanghai Zhoutai Light Industry Machinery Manufacturing Co., Ltd.
- Flexible enclosure having a seal and method and system for making the same2 Sep 2025US 12,404,077 B2Illinois Tool Works Inc.
- Resealable bag with inelastic deformable polymer5 Aug 2025US 12,378,038 B2T12 LLC
- System and method for applying a fastening material to a substrate29 Jul 2025US 12,370,751 B2Kellanova
- Resealable bag enclosure with scalloped tabs24 Sep 2026US 2026/0285545 A1Illinois Tool Works Inc.
- Wipes dispensing pouch assembly with integral membrane and zipper closure2 Jul 2026US 2026/0182788 A1Illinois Tool Works Inc.
- Film piece joining device, film manufacturing device, bag-shaped container manufacturing device, film piece joining method, film manufacturing method, and bag-shaped container manufacturing method2 Jul 2026US 2026/0184024 A1Idemitsu Unitech Co., Ltd.
- Web superposing device and bag making apparatus18 Jun 2026US 2026/0166772 A1Totani Corporation
- Heat seal assembly with perforating teeth for mono-material enclosure and method for sealing the mono-material enclosure18 Jun 2026US 2026/0167371 A1Illinois Tool Works Inc.
Most cited
By later US patents
- Vented pouch arrangement and method229US 5,059,036 AKapak Corporation · 1991
- Reclosable bag material, method and apparatus228US 4,909,017 AMinigrip, Inc. · 1990
- Reclosable bag, material, and method of and means for making same223US 4,617,683 AMinigrip, Inc. · 1986
- Tubular plastic end stops bonded to plastic zipper218US 5,482,375 AMobil Oil Corporation · 1996
- Protruding end stops for plastic reclosable fastener195US 5,131,121 AMobil Oil Corporation · 1992