D21F 3/0227
Belts or sleeves therefor
Official title: {Belts or sleeves therefor}
D21F3/0227 (Belts or sleeves therefor) appears on 279 US grants and 187 published applications in this corpus.
Search patents in D21F- Granted patents
- 279
- Published applications
- 187
- Assignees
- 64
- Inventors
- 318
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 16 | 0 |
| 1993 | 9 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 11 | 0 |
| 1999 | 8 | 0 |
| 2000 | 8 | 0 |
| 2001 | 10 | 1 |
| 2002 | 16 | 8 |
| 2003 | 5 | 14 |
| 2004 | 7 | 21 |
| 2005 | 9 | 16 |
| 2006 | 14 | 9 |
| 2007 | 7 | 17 |
| 2008 | 8 | 4 |
| 2009 | 4 | 8 |
| 2010 | 8 | 15 |
| 2011 | 14 | 5 |
| 2012 | 10 | 7 |
| 2013 | 6 | 4 |
| 2014 | 1 | 3 |
| 2015 | 3 | 4 |
| 2016 | 1 | 4 |
| 2017 | 2 | 2 |
| 2018 | 4 | 1 |
| 2019 | 1 | 3 |
| 2020 | 4 | 5 |
| 2021 | 2 | 12 |
| 2022 | 4 | 7 |
| 2023 | 7 | 7 |
| 2024 | 5 | 8 |
| 2025 | 2 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Belt4 Aug 2026US 12,698,593 B2Valmet Technologies Oy
- Press cover for a shoe press or transport belt with improved hydrophobicity16 Jun 2026US 12,655,244 B2Voith Patent GmbH
- Belt25 Nov 2025US 12,480,256 B2Valmet Technologies Oy
- Sleeve roll belt18 Nov 2025US 12,473,691 B2Valmet Technologies Oy
- Seamed felt and use of the seamed felt in a tissue machine13 Aug 2024US 12,060,681 B2Voith Patent GmbH
- Belt for pulp or paper machine with sensors for detecting pressure during operation and press using same17 Sep 2026US 2026/0275637 A1Andritz Inc.
- Press arrangement and method for pressing a fibrous web22 Jan 2026US 2026/0022518 A1Voith Patent GmbH
- Press cover for a shoe press and conveyor belt having improved properties5 Sep 2024US 2024/0295077 A1Voith Patent GmbH
- Shoe press roll cover11 Jul 2024US 2024/0229356 A1Voith Patent GmbH
- Press cover with reinforcing threads formed as twisted yarns, shoe press and method of processing a fibrous material web4 Jul 2024US 2024/0218595 A1Voith Patent GmbH
Most cited
By later US patents
- Transfer belt in a press nip closed draw transfer90US 5,298,124 AAlbany International Corp. · 1994
- Advanced dewatering system86US 7,931,781 B2Voith Patent GmbH · 2011
- Paper machine belt64US 4,552,620 ABeloit Corporation · 1985
- Extended nip press belt having an interwoven base fabric and an impervious impregnant57US 5,238,537 A1993
- Pressure belt for use with extended nip press in paper making machine51US 4,559,258 AIchikawa Woolen Textile Co., Ltd. · 1985