D21J 1/18
Hardboard
D21J1/18 (Hardboard) appears on 13 US grants and 6 published applications in this corpus.
Search patents in D21J- Granted patents
- 13
- Published applications
- 6
- Assignees
- 9
- Inventors
- 27
- Latest grant
- 11 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 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 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for manufacturing compact11 Jul 2023US 11,697,224 B2Seiko Epson Corporation
- Wood fiber board and manufacturing method thereof20 Jan 2015US 8,936,855 B2Nichiha Corporation
- Air wipe and sheet guide temperature control on paper and continuous web scanners25 Feb 2014US 8,660,682 B2Honeywell ASCa Inc.
- Product and process relating to hardboard28 Jan 1986US 4,567,215 AManville Service Corporation
- Method of making thermoplastic hardboard from acetylated mat29 Nov 1983US 4,418,101 AUnited States Gypsum Company
- Method for manufacturing compact31 Mar 2022US 2022/0097262 A1Seiko Epson Corporation
- Method for manufacturing compact31 Mar 2022US 2022/0098797 A1Seiko Epson Corporation
- Determining strength of wood fiberboard19 Jul 2018US 2018/0202112 A1Siempelkamp Maschinen- und Anlagenbau GmbH & Co. KG
- Air Wipe and Sheet Guide Temperature Control on Paper and Continuous Web Scanners24 May 2012US 2012/0130526 A1Honeywell ASCa Inc.
- Wood fiber board and manufacturing method thereof3 May 2012US 2012/0108706 A1Nichiha Corporation
Most cited
By later US patents
- Non-combustible hardboard sheet21US 4,072,558 AConwed Corporation · 1978
- Non-combustible hardboard sheet11US 4,024,014 AConwed Corporation · 1977
- Production of hardboard in a closed water system7US 4,009,073 AAbitibi Paper Company Ltd. · 1977
- Hard board or medium density board, process for production thereof and means for practicizing the process5US 4,113,555 ASvenska Traforskningsinstitutet · 1978
- Product and process relating to hardboard5US 4,567,215 AManville Service Corporation · 1986