D21J 3/12
Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
Official title: of sheets; of diaphragms
D21J3/12 (Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds) appears on 30 US grants and 39 published applications in this corpus.
Search patents in D21J- Granted patents
- 30
- Published applications
- 39
- Assignees
- 38
- Inventors
- 94
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 3 |
| 2017 | 4 | 1 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 3 |
| 2021 | 0 | 5 |
| 2022 | 1 | 7 |
| 2023 | 2 | 0 |
| 2024 | 2 | 5 |
| 2025 | 4 | 4 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process and system for manufacturing a fibreboard from waste materials22 Sep 2026US 12,742,293 B2
- Wet cellulose fiber sheet and method for producing cellulose fiber molded body19 May 2026US 12,630,980 B2Daio Paper Corporation
- Egg carton and formation apparatus and method17 Feb 2026US 12,552,596 B2Consider Provisions, LLC
- Moisture/oil-resistant fiber/starch composite materials28 Oct 2025US 12,454,795 B2The United States of America as represented by the Secretary of Agriculture
- Compostable paperboard for pressware products20 May 2025US 12,305,337 B2GPCP IP Holdings LLC
- Method for making flat box blanks and method for packaging products17 Sep 2026US 2026/0274474 A1Fameccanica, Data S.P A.
- An apparatus for recycling paper and cardboard materials3 Sep 2026US 2026/0258603 A1Point of Origin Waste Solutions Limited
- System and method for producing fiber molded products2 Jul 2026US 2026/0185302 A1
- Fiber molding system and method2 Jul 2026US 2026/0185306 A1
- Method of manufacturing molded body and molded body manufacturing apparatus18 Jun 2026US 2026/0168179 A1Seiko Epson Corporation
Most cited
By later US patents
- Molded stressed-skin panels23US 5,876,835 AGridcore Systems International · 1999
- Method for manufacturing a paper diaphragm for a loud speaker17US 6,059,926 ASharp Kabushiki Kaisha · 2000
- Diaphragm for speaker and method of producing same13US 4,308,094 ASanyo Electric Co., Ltd. · 1981
- Solid articles from poly alpha-1,3-glucan and wood pulp13US 9,644,322 B2E. I. Du Pont de Nemours and Company · 2017
- Method of molding preform having 600% by weight water11US 4,014,737 A1977