D21F 1/325
With reciprocating devices
Official title: {with reciprocating devices}
D21F1/325 (With reciprocating devices) appears on 36 US grants and 33 published applications in this corpus.
Search patents in D21F- Granted patents
- 36
- Published applications
- 33
- Assignees
- 20
- Inventors
- 82
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 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 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 3 |
| 2017 | 2 | 3 |
| 2018 | 1 | 1 |
| 2019 | 3 | 1 |
| 2020 | 2 | 4 |
| 2021 | 0 | 0 |
| 2022 | 0 | 3 |
| 2023 | 2 | 3 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Cleaning apparatus and fiber structure manufacturing apparatus15 Aug 2023US 11,725,343 B2Seiko Epson Corporation
- Cleaning system and method for cleaning a band circulating in a paper making machine and paper making machine comprising said system28 Mar 2023US 11,613,847 B2S.A. Giuseppe Cristini S.P.A.
- Sheet manufacturing apparatus and power switching device26 Dec 2024US 2024/0426055 A1Seiko Epson Corporation
- Fabric cleaning systems and methods using synchronized cross-machine direction traversing cleaning heads22 Jun 2023US 2023/0193554 A1Kadant Nordic AB
- Chemical solution spraying method15 Jun 2023US 2023/0182157 A1Maintech Co., Ltd.
- Method for spraying chemical solution15 Jun 2023US 2023/0183922 A1Maintech Co., Ltd.
- System and method for cleaning of belts and/or fabrics used on through air drying papermaking machines8 Dec 2022US 2022/0389654 A1First Quality Tissue, LLC
Most cited
By later US patents
- 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
- Process for cleaning a transport belt28US 6,364,959 B1Voith Sulzer Papiertechnik Patent GmbH · 2002
- Jet device20US 5,879,515 AVoith Sulzer Papiermaschinen GmbH · 1999
- Process for cleaning a transport belt17US 5,964,956 AVoith Sulzer Papiermaschinen GmbH · 1999