D21D 5/046
Rotary screens
Official title: {Rotary screens}
D21D5/046 (Rotary screens) appears on 12 US grants and 3 published applications in this corpus.
Search patents in D21D- Granted patents
- 12
- Published applications
- 3
- Assignees
- 11
- Inventors
- 24
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 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 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Separation device and sheet manufacturing apparatus12 May 2026US 12,624,499 B2Seiko Epson Corporation
- Reusable material handling disc for recovery and separation of recyclable materials4 Jun 2019US 10,307,793 B2Emerging Acquisitions, LLC
- Adjustable control valve system for rotating disc filter and method of operating the system22 Jun 1999US 5,914,048 ABeloit Technologies, Inc.
- Method and device for separating a suspension, preferably a fibre suspension15 Aug 1995US 5,441,157 ACelleco Hedemora AB
- Method for treating fiber suspension9 Mar 1993US 5,192,454 AA. Ahlstrom Corporation
- Filter Sector for a Filter Disc and Disc Filter With a Filter Sector21 Mar 2024US 2024/0091684 A1Andritz Inc.
- Separation device and sheet manufacturing apparatus13 Jul 2023US 2023/0220619 A1Seiko Epson Corporation
- Reusable material handling disc for recoveryy and separation of recyclable materials26 Oct 2017US 2017/0304868 A1Emerging Acquisitions, LLC
Most cited
By later US patents
- Screen segment for filters for thickening fiber suspensions42US 4,950,403 A1990
- Method of and device for fractionating suspensions23US 5,124,029 AAB Celleco · 1992
- Adjustable control valve system for rotating disc filter and method of operating the system14US 5,914,048 ABeloit Technologies, Inc. · 1999
- Method and apparatus for improving the operation of a disc filter10US 4,995,991 AA. Ahlstrom Corporation · 1991
- Tramp material separator9US 4,737,274 AKamyr, Inc. · 1988