D21B 1/20
With chain feed
Official title: with chain feed
D21B1/20 (With chain feed) appears on 4 US grants and 1 published applications in this corpus.
Search patents in D21B- Granted patents
- 4
- Published applications
- 1
- Assignees
- 3
- Inventors
- 6
- Latest grant
- 30 Jan 2007
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 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 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Arrangement for treating pulpstone surface30 Jan 2007US 7,169,021 B2Metso Paper, Inc.
- Apparatus for distribution of logs into grinder supply shafts23 Jan 1990US 4,895,241 AKone Corporation
- Apparatus for the production of mechanical wood pulp20 Sep 1983US 4,405,091 AJ. M. Voith GmbH
- Apparatus and process for producing wood pulp in a pressurized wood grinder24 Mar 1981US 4,257,563 AJ. M. Voith GmbH
Most cited
By later US patents
- Apparatus and process for producing wood pulp in a pressurized wood grinder3US 4,257,563 AJ. M. Voith GmbH · 1981
- Apparatus for distribution of logs into grinder supply shafts2US 4,895,241 AKone Corporation · 1990
- Apparatus for the production of mechanical wood pulp1US 4,405,091 AJ. M. Voith GmbH · 1983