D21F 1/52
Suction boxes without rolls
D21F1/52 (Suction boxes without rolls) appears on 126 US grants and 66 published applications in this corpus.
Search patents in D21F- Granted patents
- 126
- Published applications
- 66
- Assignees
- 57
- Inventors
- 206
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 6 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 0 |
| 2002 | 2 | 4 |
| 2003 | 3 | 4 |
| 2004 | 2 | 7 |
| 2005 | 2 | 0 |
| 2006 | 2 | 3 |
| 2007 | 2 | 5 |
| 2008 | 1 | 2 |
| 2009 | 5 | 2 |
| 2010 | 2 | 1 |
| 2011 | 4 | 1 |
| 2012 | 1 | 1 |
| 2013 | 2 | 2 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 4 | 2 |
| 2018 | 3 | 3 |
| 2019 | 1 | 7 |
| 2020 | 3 | 4 |
| 2021 | 3 | 5 |
| 2022 | 4 | 2 |
| 2023 | 4 | 0 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sheet manufacturing apparatus1 Sep 2026US 12,723,351 B2Seiko Epson Corporation
- Dewatering box cover19 Nov 2024US 12,146,263 B2First Quality Tissue, LLC
- Dewatering box cover19 Nov 2024US 12,146,265 B2First Quality Tissue, LLC
- Elongated component for a manufacturing machine of a fibrous cellulosic web, its use and method for recycling14 Nov 2023US 11,814,793 B2Valmet Technologies Oy
- Dewatering device10 Oct 2023US 11,781,269 B2Voith Patent GmbH
- Ceiling basemat water reduction through strategic use of pressing and vacuuming17 Sep 2026US 2026/0275636 A1USG Interiors, Inc.
- Dewatering box cover6 Aug 2026US 2026/0226681 A1First Quality Tissue, LLC
- Dewatering box cover30 Jul 2026US 2026/0218451 A1First Quality Tissue, LLC
- Dewatering box cover13 Feb 2025US 2025/0052003 A1First Quality Tissue, LLC
- Dewatering box cover13 Feb 2025US 2025/0052004 A1First Quality Tissue, LLC
Most cited
By later US patents
- Method for making cellulosic web with reduced energy input178US 6,096,169 AKimberly-Clark Worldwide, Inc. · 2000
- Air press for dewatering a wet web165US 6,143,135 AKimberly-Clark Worldwide, Inc. · 2000
- Method of dewatering wet web using an integrally sealed air press112US 6,083,346 AKimberly-Clark Worldwide, Inc. · 2000
- Air press method for dewatering a wet web96US 6,228,220 B1Kimberly-Clark Worldwide, Inc. · 2001
- Air press for dewatering a wet web89US 6,080,279 AKimberly-Clark Worldwide, Inc. · 2000