B29C 33/505
Cores or mandrels
Official title: {cores or mandrels, e.g. inflatable (B29C33/0016 takes precedence; for winding and joining B29C53/824; for supporting articles during joining B29C66/634; flexible cores for vulcanizing tyres B29D30/0654)}
B29C33/505 (Cores or mandrels) appears on 276 US grants and 286 published applications in this corpus.
Search patents in B29C- Granted patents
- 276
- Published applications
- 286
- Assignees
- 151
- Inventors
- 600
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 11 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 4 |
| 2003 | 4 | 4 |
| 2004 | 4 | 3 |
| 2005 | 1 | 3 |
| 2006 | 3 | 2 |
| 2007 | 1 | 5 |
| 2008 | 1 | 2 |
| 2009 | 3 | 15 |
| 2010 | 4 | 9 |
| 2011 | 9 | 20 |
| 2012 | 2 | 4 |
| 2013 | 8 | 15 |
| 2014 | 10 | 17 |
| 2015 | 13 | 10 |
| 2016 | 17 | 32 |
| 2017 | 14 | 9 |
| 2018 | 13 | 12 |
| 2019 | 13 | 16 |
| 2020 | 12 | 23 |
| 2021 | 14 | 19 |
| 2022 | 17 | 19 |
| 2023 | 23 | 15 |
| 2024 | 16 | 15 |
| 2025 | 11 | 6 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tooling element and methods for forming and using same11 Aug 2026US 12,703,124 B2Rohr, Inc.
- Composite structures and methods of forming composite structures11 Aug 2026US 12,703,158 B2Astro Tech Co., Ltd.
- Method for the manufacture of a structural component in composite material reinforced with stiffening stringers and structural component10 Feb 2026US 12,545,392 B2Leonardo S.P.A.
- Bladder vent plugs for composite-manufacturing bladders and systems and methods for assembling stiffened composite structures3 Feb 2026US 12,539,647 B2The Boeing Company
- Lightweight modular hybrid electro-mechanical collapsible and expandable mandrel for forming prismatic and non-prismatic hollow bars and/or cylinders for use as building materials and method for making same6 Jan 2026US 12,515,380 B2University of Pittsburgh—Of The Commonwealth System of Higher
- Method of making hollow component of composite material using collapsable and reusable mandrel1 Oct 2026US 2026/0295950 A1Universita' Degli Studi Di Catania
- Sacrificial element for the production of ribbed bodies of composite material20 Aug 2026US 2026/0241615 A1Addyx S.R.L.
- Apparatus and methods for forming composite components30 Jul 2026US 2026/0216970 A1Short Brothers PLC
- Portable fabrication systems and methods using expandable tooling23 Jul 2026US 2026/0208451 A1The Boeing Company
- Apparatus and Methods for Forming Composite Components23 Jul 2026US 2026/0208452 A1Short Brothers PLC
Most cited
By later US patents
- Method of fabricating aircraft fuselage structure96US 5,223,067 AFuji Jukogyo Kabushiki Kaisha · 1993
- Method for fabricating an advanced composite aerostructure article having an integral co-cured fly away hollow mandrel93US 6,458,309 B1Rohr, Inc. · 2002
- Method of making a hollow article68US 4,126,659 ALockheed Aircraft Corporation · 1978
- Method of fabricating a complex part made of composite material58US 5,286,438 AUnited Technologies Corporation · 1994
- Method of making and using flexible mandrel46US 5,262,121 A1993