D21F 13/04
On cylinder board machines
Official title: on cylinder board machines
D21F13/04 (On cylinder board machines) appears on 6 US grants and 1 published applications in this corpus.
Search patents in D21F- Granted patents
- 6
- Published applications
- 1
- Assignees
- 7
- Inventors
- 13
- Latest grant
- 25 Jul 2000
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 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 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of manufacturing laminated plates, pencil boards and/or shafts for writing, drawing or painting25 Jul 2000US 6,092,950 AJ.S. Staedtler GmbH & Co. KG
- Method of manufacturing an inorganic board28 Oct 1997US 5,681,428 ANichiha Corporation
- Frame construction of the press section in a paper machine7 Nov 1989US 4,879,002 AOy Tampella AB
- Method for producing oriented fleeces or mats of short length fibers19 Mar 1985US 4,505,777 AMesserschmitt-Boelkow-Blohm GmbH
- Fiber reinforced plastic articles and method of preparation4 May 1976US 3,954,555 ANational Gypsum Company
Most cited
By later US patents
- Fiber reinforced plastic articles and method of preparation54US 3,954,555 ANational Gypsum Company · 1976
- Method of manufacturing an inorganic board20US 5,681,428 ANichiha Corporation · 1997
- Inorganic composition for high temperature use and method of forming a millboard therefrom17US 3,954,556 AJohns Manville · 1976
- Method for producing oriented fleeces or mats of short length fibers15US 4,505,777 AMesserschmitt-Boelkow-Blohm GmbH · 1985
- Frame construction of the press section in a paper machine2US 4,879,002 AOy Tampella AB · 1989