B31F 1/2813
Making corrugated cardboard of composite structure
Official title: {Making corrugated cardboard of composite structure, e.g. comprising two or more corrugated layers}
B31F1/2813 (Making corrugated cardboard of composite structure) appears on 73 US grants and 66 published applications in this corpus.
Search patents in B31F- Granted patents
- 73
- Published applications
- 66
- Assignees
- 43
- Inventors
- 120
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 8 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 2 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 2 | 3 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 3 | 1 |
| 2015 | 0 | 4 |
| 2016 | 0 | 1 |
| 2017 | 2 | 6 |
| 2018 | 0 | 7 |
| 2019 | 4 | 8 |
| 2020 | 3 | 3 |
| 2021 | 6 | 6 |
| 2022 | 5 | 1 |
| 2023 | 2 | 1 |
| 2024 | 4 | 6 |
| 2025 | 2 | 1 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for detecting paper splice part of cardboard sheet, and device for producing cardboard sheet31 Mar 2026US 12,589,572 B2Mitsubishi Heavy Industries Machinery Systems, Ltd.
- Corrugated cardboard production plant with double output side2 Dec 2025US 12,485,639 B2Quantumcorrugated S.R.L.
- Plant and method for producing a corrugated board25 Nov 2025US 12,479,185 B2Fosber S.p.A.
- Corrugated pizza box and method for production of same15 Oct 2024US 12,116,192 B1Semi Corr Containers, Inc.
- Semi-corrugated paperboard panels and method for production of same20 Aug 2024US 12,064,943 B1Semi Corr Containers, Inc.
- Method for operating a corrugator, and corrugator25 Jun 2026US 2026/0178242 A1BHS Corrugated Maschinen-und Anlagenbau GmbH
- System and method for corrugated cardboard11 Jun 2026US 2026/0158761 A1
- Corrugated cardboard production apparatuses14 May 2026US 2026/0131565 A1Quantumcorrugated S.R.L.
- Plant and method for producing a corrugated board26 Feb 2026US 2026/0054464 A1Fosber S.p.A.
- In-line corrugated cardboard laminating plants19 Jun 2025US 2025/0196490 A1Fosber S.p.A.
Most cited
By later US patents
- Laminated moisture resistant poultry box and process94US 10,226,909 B2Indevco Plastics, Inc. · 2019
- Pizza box76US 4,441,626 AFidelity Grafcor, Inc. · 1984
- Method of making corrugated paper board58US 4,886,563 AAmcor Limited · 1989
- Method for making an improved variable flute container52US 4,260,442 AInternational Paper Company · 1981
- Packaging material and container having interlaminate electrostatic shield and method of making same51US 4,685,563 AMichelman, Inc. · 1987