B31B 70/81
Forming or attaching accessories
Official title: Forming or attaching accessories, e.g. opening devices, closures or tear strings
B31B70/81 (Forming or attaching accessories) appears on 1,197 US grants and 1,132 published applications in this corpus.
Search patents in B31B- Granted patents
- 1,197
- Published applications
- 1,132
- Assignees
- 474
- Inventors
- 1,551
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 12 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 18 | 0 |
| 1982 | 7 | 0 |
| 1983 | 10 | 0 |
| 1984 | 7 | 0 |
| 1985 | 16 | 0 |
| 1986 | 16 | 0 |
| 1987 | 25 | 0 |
| 1988 | 11 | 0 |
| 1989 | 30 | 0 |
| 1990 | 15 | 0 |
| 1991 | 25 | 0 |
| 1992 | 14 | 0 |
| 1993 | 11 | 0 |
| 1994 | 18 | 0 |
| 1995 | 20 | 0 |
| 1996 | 12 | 0 |
| 1997 | 25 | 0 |
| 1998 | 25 | 0 |
| 1999 | 33 | 0 |
| 2000 | 38 | 0 |
| 2001 | 28 | 24 |
| 2002 | 36 | 53 |
| 2003 | 49 | 62 |
| 2004 | 41 | 93 |
| 2005 | 50 | 66 |
| 2006 | 38 | 54 |
| 2007 | 42 | 53 |
| 2008 | 32 | 41 |
| 2009 | 20 | 40 |
| 2010 | 24 | 52 |
| 2011 | 20 | 52 |
| 2012 | 31 | 47 |
| 2013 | 28 | 36 |
| 2014 | 22 | 37 |
| 2015 | 29 | 41 |
| 2016 | 20 | 40 |
| 2017 | 28 | 56 |
| 2018 | 27 | 42 |
| 2019 | 22 | 34 |
| 2020 | 34 | 43 |
| 2021 | 31 | 30 |
| 2022 | 31 | 30 |
| 2023 | 25 | 40 |
| 2024 | 42 | 32 |
| 2025 | 20 | 19 |
| 2026 | 12 | 15 |
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
- “Deli” bag with extra thin walls and increased strength and method of manufacturing same18 Aug 2026US 12,709,439 B2New York Packaging II
- Packaging bag with spout and method for producing packaging bag with spout14 Jul 2026US 12,679,619 B2ZACROS Corporation
- Method for manufacturing a container and manufacturing device24 Sep 2026US 2026/0285000 A1Mondi AG
- Resealable bag enclosure with scalloped tabs24 Sep 2026US 2026/0285545 A1Illinois Tool Works Inc.
- Process for making a recyclable compostable paper bag17 Sep 2026US 2026/0273885 A1The Paper People LLC
- Recyclable compostable paper bag17 Sep 2026US 2026/0273886 A1The Paper People LLC
- Improved method for making and filling pouches with or without spout for packaging fluid products and related plant23 Jul 2026US 2026/0208901 A1
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