B29C 51/421
Of preforms, specially adapted for thermoforming
Official title: {of preforms, specially adapted for thermoforming (preheating sheets in general B29B13/023; B29C51/427 takes precedence)}
B29C51/421 (Of preforms, specially adapted for thermoforming) appears on 373 US grants and 427 published applications in this corpus.
Search patents in B29C- Granted patents
- 373
- Published applications
- 427
- Assignees
- 308
- Inventors
- 886
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 11 |
| 2003 | 2 | 7 |
| 2004 | 9 | 14 |
| 2005 | 3 | 10 |
| 2006 | 4 | 12 |
| 2007 | 4 | 6 |
| 2008 | 5 | 2 |
| 2009 | 1 | 10 |
| 2010 | 8 | 7 |
| 2011 | 3 | 13 |
| 2012 | 5 | 16 |
| 2013 | 7 | 25 |
| 2014 | 7 | 14 |
| 2015 | 9 | 29 |
| 2016 | 10 | 14 |
| 2017 | 16 | 31 |
| 2018 | 15 | 27 |
| 2019 | 34 | 30 |
| 2020 | 16 | 32 |
| 2021 | 24 | 18 |
| 2022 | 23 | 22 |
| 2023 | 20 | 19 |
| 2024 | 27 | 15 |
| 2025 | 20 | 29 |
| 2026 | 11 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vacuum forming method for membrane-like objects having protruding structures and forming apparatus thereof29 Sep 2026US 12,746,715 B2
- System and method of manufacturing fiber based articles with steam molding8 Sep 2026US 12,728,583 B2Persico S.P.A.
- Rotatable mold apparatus8 Sep 2026US 12,728,584 B2Hyundai Mobis Co., Ltd.
- Thermoforming oven with separating heating elements5 May 2026US 12,617,143 B2Brown LLC
- Container with product visualization aperture21 Apr 2026US 12,605,901 B2Sonoco Development, Inc.
- Vacuum forming method for membrane-like objects having protruding structures and forming apparatus thereof17 Sep 2026US 2026/0273834 A1
- Core panels for a wind turbine blade20 Aug 2026US 2026/0241632 A1Kurvatur A/S
- Forming table6 Aug 2026US 2026/0225328 A1Tusas- Turk Havacilik Ve Uzay Sanayii Anonim Sirketi
- Methods of thermoforming cellulose ester foamed articles6 Aug 2026US 2026/0226245 A1Eastman Chemical Company
- Aligner manufacturing systems9 Jul 2026US 2026/0192507 A1Align Technology, Inc.
Most cited
By later US patents
- Methods and systems for thermal forming an object150US 9,108,338 B2Align Technology, Inc. · 2015
- 3D thermoplastic composite pultrusion system and method121US 9,764,520 B2Ebert Composites Corporation · 2017
- 3D thermoplastic composite pultrusion system and method120US 9,616,623 B2Ebert Composites Corporation · 2017
- 3D thermoplastic composite pultrusion system and method119US 10,124,546 B2Ebert Composites Corporation · 2018
- 3D thermoplastic composite pultrusion system and method119US 9,610,737 B2Ebert Composites Corporation · 2017