E04G 9/021
The form surface being of cardboard
Official title: {the form surface being of cardboard}
E04G9/021 (The form surface being of cardboard) appears on 18 US grants and 22 published applications in this corpus.
Search patents in E04G- Granted patents
- 18
- Published applications
- 22
- Assignees
- 16
- Inventors
- 35
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 4 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concrete form apparatus and method of using7 Jul 2026US 12,674,334 B2American Forming Products LLC
- Material, a layered or laminated material, formwork and or construction element3 Jun 2025US 12,319,039 B2Plastic Free Packaging Party Ltd
- Concrete form apparatus and method of using16 May 2023US 11,649,649 B2American Forming Products LLC
- Method and apparatus for forming a formwork for a concrete slab4 Sep 2018US 10,066,404 B2
- Water proof construction unit24 Oct 2017US 9,797,147 B2
- Method for manufacturing a device for a master forming process, device for a master forming process and master forming process29 Jan 2026US 2026/0028780 A1Università Della Svizzera Italiana
- Material, a new and improved layered or laminated material, formwork and or construction element13 Nov 2025US 2025/0346026 A1Plastic Free Packaging Pty Ltd
- Concrete form apparatus and method of using10 Aug 2023US 2023/0250652 A1American Forming Products LLC
- A new material, a new and improved layered or laminated material, formwork and or construction element28 Apr 2022US 2022/0126553 A1Plastic Free Packaging Pty Ltd
- Concrete form apparatus16 Jul 2020US 2020/0224438 A1American Forming Products LLC
Most cited
By later US patents
- Sleeve assembly for forming openings in molded structures24US 5,405,119 A1995
- Insert void forming device22US 4,170,853 ARaceway Components, Inc. · 1979
- Apparatus for forming voids under concrete floors21US 6,116,568 AVoid Form International Ltd. · 2000
- Two-part collapsible corrugated paper form void11US 5,782,049 ASurevoid Products, Inc. · 1998
- Method and apparatus for forming a formwork for a concrete slab10US 10,066,404 B22018