B29C 55/28
Shaping by stretching: of blown tubular films
Official title: of blown tubular films, e.g. by inflation {(extrusion moulding of tubular films B29C48/03)}
B29C55/28 (Shaping by stretching: of blown tubular films) appears on 246 US grants and 259 published applications in this corpus.
Search patents in B29C- Granted patents
- 246
- Published applications
- 259
- Assignees
- 173
- Inventors
- 624
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 5 |
| 2003 | 7 | 8 |
| 2004 | 5 | 7 |
| 2005 | 3 | 14 |
| 2006 | 6 | 9 |
| 2007 | 3 | 4 |
| 2008 | 1 | 10 |
| 2009 | 4 | 7 |
| 2010 | 6 | 5 |
| 2011 | 0 | 6 |
| 2012 | 5 | 4 |
| 2013 | 5 | 6 |
| 2014 | 1 | 11 |
| 2015 | 3 | 9 |
| 2016 | 7 | 17 |
| 2017 | 8 | 16 |
| 2018 | 9 | 14 |
| 2019 | 10 | 16 |
| 2020 | 10 | 12 |
| 2021 | 17 | 11 |
| 2022 | 12 | 16 |
| 2023 | 8 | 14 |
| 2024 | 15 | 21 |
| 2025 | 8 | 7 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High performance cooling element8 Sep 2026US 12,728,580 B2Addex, Inc.
- Multilayer film having excellent recoverability25 Aug 2026US 12,715,195 B2Kuraray Co., Ltd.
- Copolyamide and polymer film containing at least one diamine, a dicarboxylic acid and 1,5-diamino-3-oxapentane25 Aug 2026US 12,715,963 B2BASF SE
- Inflation molding device30 Jun 2026US 12,668,013 B2Sumitomo Heavy Industries, Ltd.
- Polypropylene film with improved slip performance14 Apr 2026US 12,600,807 B2Borealis AG
- Dimensionally stable biodegradable film27 Aug 2026US 2026/0249543 A1Danimer IPCo, LLC
- Controlled pressure enclosure2 Jul 2026US 2026/0184002 A1Addex, Inc.
- Inflation molding apparatus and inflation molding method11 Jun 2026US 2026/0158731 A1Sumitomo Heavy Industries Modern, Ltd.
- Method for producing stretched film23 Apr 2026US 2026/0109105 A1Kaneka Corporation
- Tempering device and blown film line with a tempering device16 Apr 2026US 2026/0102960 A1Kdesign GmbH
Most cited
By later US patents
- Polylactic acid resin composition and film therefrom90US 6,235,825 B1Mitsui Chemicals, Inc. · 2001
- Puncture resistant polymeric films, blends and process74US 6,815,023 B1Curwood, Inc. · 2004
- Battery separators with reduced splitting propensity67US 6,602,593 B1Celgard, LLC · 2003
- Heat-shrinkable multilayer film48US 6,699,549 B1Kureha Kagaku Kogyo Kabushiki Kaisha · 2004
- Composition and films thereof47US 6,593,005 B2Dow Global Technologies LLC · 2003