D21F 1/32
Washing wire-cloths or felts
D21F1/32 (Washing wire-cloths or felts) appears on 143 US grants and 115 published applications in this corpus.
Search patents in D21F- Granted patents
- 143
- Published applications
- 115
- Assignees
- 71
- Inventors
- 270
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 9 | 0 |
| 2001 | 4 | 1 |
| 2002 | 6 | 5 |
| 2003 | 1 | 8 |
| 2004 | 4 | 5 |
| 2005 | 2 | 7 |
| 2006 | 4 | 12 |
| 2007 | 5 | 4 |
| 2008 | 4 | 8 |
| 2009 | 6 | 1 |
| 2010 | 4 | 4 |
| 2011 | 2 | 3 |
| 2012 | 2 | 3 |
| 2013 | 1 | 6 |
| 2014 | 3 | 3 |
| 2015 | 4 | 1 |
| 2016 | 0 | 3 |
| 2017 | 4 | 7 |
| 2018 | 3 | 5 |
| 2019 | 5 | 8 |
| 2020 | 7 | 6 |
| 2021 | 5 | 1 |
| 2022 | 1 | 3 |
| 2023 | 3 | 7 |
| 2024 | 2 | 2 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Chemical solution spraying method27 Jan 2026US 12,533,698 B2Maintech Co., Ltd.
- Method for spraying chemical solution25 Mar 2025US 12,258,709 B2Maintech Co., Ltd.
- System and method for cleaning of belts and/or fabrics used on through air drying papermaking machines11 Feb 2025US 12,221,748 B2First Quality Tissue, LLC
- Systems and methods for cleaning composite laminated imprinting fabrics10 Dec 2024US 12,163,286 B2First Quality Tissue, LLC
- Device and method for producing a fibrous web11 Jun 2024US 12,006,631 B2Andritz Inc.
- Device for dewatering or cleaning a fabric in a paper machine, and paper machine comprising such a device19 Jun 2025US 2025/0198085 A1Valmet Corporation
- Wire treatment for dust control23 Jan 2025US 2025/0027275 A1Ecolab USA Inc.
- Sheet manufacturing apparatus and power switching device26 Dec 2024US 2024/0426055 A1Seiko Epson Corporation
- Sheet manufacturing apparatus and cleaning device12 Dec 2024US 2024/0410112 A1Seiko Epson Corporation
- Crescent former for producing tissue paper6 Jul 2023US 2023/0212819 A1Valmet Corporation
Most cited
By later US patents
- Former and process for producing a tissue web71US 6,821,391 B2Voith Paper Patent GmbH · 2004
- Belt cleaning device for papermaking machines49US 5,783,044 AVoith Sulzer Papiermaschinen GmbH · 1998
- Utilization of a suction nozzle and jet nozzle for cleaning moving objects43US 5,603,775 A1997
- Method used in paper making for treatment of a weave30US 4,391,672 AValmet Corporation · 1983
- Apparatus for measuring the condition of a felt in a paper machine30US 5,349,845 ATamfelt Oy Ab · 1994