B29C 44/42
Using pressure difference
Official title: using pressure difference, e.g. by injection or by vacuum
B29C44/42 (Using pressure difference) appears on 324 US grants and 402 published applications in this corpus.
Search patents in B29C- Granted patents
- 324
- Published applications
- 402
- Assignees
- 265
- Inventors
- 851
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 4 |
| 2003 | 3 | 2 |
| 2004 | 0 | 2 |
| 2005 | 4 | 5 |
| 2006 | 1 | 2 |
| 2007 | 2 | 3 |
| 2008 | 2 | 9 |
| 2009 | 1 | 4 |
| 2010 | 2 | 5 |
| 2011 | 3 | 3 |
| 2012 | 5 | 5 |
| 2013 | 1 | 4 |
| 2014 | 5 | 11 |
| 2015 | 2 | 9 |
| 2016 | 7 | 9 |
| 2017 | 10 | 18 |
| 2018 | 7 | 26 |
| 2019 | 13 | 40 |
| 2020 | 13 | 40 |
| 2021 | 26 | 43 |
| 2022 | 29 | 41 |
| 2023 | 40 | 37 |
| 2024 | 28 | 32 |
| 2025 | 25 | 32 |
| 2026 | 17 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Footwear mold assembly for injection-molding25 Aug 2026US 12,715,971 B2NIKE, Inc.
- Injection moulding process for the preparation of a foamed article with improved surface quality28 Jul 2026US 12,691,612 B2Sabic Global Technologies B.V.
- Process and system for manufacturing products cast with polyurethane and having a constant cross-section9 Jun 2026US 12,649,268 B2Indresmat, S.L.
- Injection molding machine for performing foam molding and method for controlling injection molding machine12 May 2026US 12,623,387 B2The Japan Steel Works, Ltd.
- Insulation foaming structure and method for a tank container12 May 2026US 12,623,419 B2Nantong Tank Container Co., Ltd.
- Polystyrene Foams With a Fluoropolymer Additive, Compositions Thereof and Methods of Making23 Jul 2026US 2026/0209500 A1Shpp Global Technologies B.V.
- Foam molding method, control method for injection molding machine for foam molding, and injection molding machine for foam molding2 Jul 2026US 2026/0183994 A1Shibaura Machine Co., Ltd.
- Core-back injection molding of interior plastic components using rapid heating and cooling system25 Jun 2026US 2026/0175474 A1GM Global Technology Operations LLC
- Foamed container25 Jun 2026US 2026/0175476 A1Sabic Global Technologies B.V.
- Foamed article25 Jun 2026US 2026/0175479 A1Sabic Global Technologies B.V.
Most cited
By later US patents
- Microcellular closed cell foams and their method of manufacture215US 4,473,665 AMassachusetts Institute of Technology · 1984
- Method and apparatus for making large size, low density, elongated thermoplastic cellular bodies98US 4,323,528 AValcour Imprinted Papers, Inc. · 1982
- Press and safety latch therefor92US 4,007,679 ACincinnati Milacron Inc. · 1977
- Injection-expansion molded, thermoplastic resin product and production process thereof81US 5,997,781 AMitsui Chemicals, Inc. · 1999
- Method and apparatus for injection molding foamed resin products having a smooth finish on their surface52US 4,201,742 AEx-Cell-O Corporation · 1980