D21G 1/00
Calenders
Official title: Calenders (if restricted to the treatment of particular materials see the relevant class, e.g. B29C43/24, D06); Smoothing apparatus
D21G1/00 (Calenders) appears on 1,088 US grants and 514 published applications in this corpus.
Search patents in D21G- Granted patents
- 1,088
- Published applications
- 514
- Assignees
- 294
- Inventors
- 1,326
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 15 | 0 |
| 1978 | 17 | 0 |
| 1979 | 5 | 0 |
| 1980 | 12 | 0 |
| 1981 | 13 | 0 |
| 1982 | 16 | 0 |
| 1983 | 11 | 0 |
| 1984 | 18 | 0 |
| 1985 | 14 | 0 |
| 1986 | 11 | 0 |
| 1987 | 23 | 0 |
| 1988 | 23 | 0 |
| 1989 | 25 | 0 |
| 1990 | 26 | 0 |
| 1991 | 37 | 0 |
| 1992 | 39 | 0 |
| 1993 | 24 | 0 |
| 1994 | 20 | 0 |
| 1995 | 25 | 0 |
| 1996 | 28 | 0 |
| 1997 | 39 | 0 |
| 1998 | 44 | 0 |
| 1999 | 47 | 0 |
| 2000 | 41 | 0 |
| 2001 | 65 | 18 |
| 2002 | 56 | 44 |
| 2003 | 42 | 54 |
| 2004 | 53 | 52 |
| 2005 | 35 | 40 |
| 2006 | 34 | 31 |
| 2007 | 18 | 33 |
| 2008 | 20 | 26 |
| 2009 | 14 | 20 |
| 2010 | 19 | 23 |
| 2011 | 19 | 7 |
| 2012 | 11 | 9 |
| 2013 | 6 | 8 |
| 2014 | 10 | 12 |
| 2015 | 9 | 17 |
| 2016 | 8 | 12 |
| 2017 | 7 | 10 |
| 2018 | 8 | 12 |
| 2019 | 10 | 7 |
| 2020 | 10 | 12 |
| 2021 | 5 | 13 |
| 2022 | 11 | 13 |
| 2023 | 9 | 10 |
| 2024 | 13 | 11 |
| 2025 | 4 | 10 |
| 2026 | 7 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Smoking rolling paper and a method for packaging the same29 Sep 2026US 12,745,793 B2
- Pneumatic zone-controlled deflection compensation for roll18 Aug 2026US 12,709,842 B2Aalto University Foundation sr
- Roll cover and roll30 Jun 2026US 12,668,922 B2Voith Patent GmbH
- Press cover for a shoe press or transport belt with improved hydrophobicity16 Jun 2026US 12,655,244 B2Voith Patent GmbH
- Method and device for producing or treating a web of fibrous material14 Apr 2026US 12,601,116 B2Voith Patent GmbH
- Method for producing a base paper17 Sep 2026US 2026/0275643 A1Mondi AG
- Nip Roller Adjustment11 Jun 2026US 2026/0162955 A1
- Collar for compressing sleeve on drum4 Jun 2026US 2026/0151982 A1Suominen Oyj
- Calender for Producing an Electrode Film from a Powder-Type Electrode Precursor Material, Corresponding Method and Corresponding Electrode Film14 May 2026US 2026/0135077 A1
- A sleeve for a drum7 May 2026US 2026/0125836 A1Suominen Oyj
Most cited
By later US patents
- Apparatus for calendering a sheet material web carried by a fabric89US 6,585,858 B1Kimberly-Clark Worldwide, Inc. · 2003
- Rolls of controllable flexure, especially for machines for the production and processing of webs of paper or plastic75US 4,233,011 AER-WE-PA Maschinenfabrik & Eisengiesserei · 1980
- Dynamic nip pressure and temperature sensing system72US 5,562,027 AStowe Woodward Licensco, LLC · 1996
- Paper products and methods and systems for manufacturing such products66US 7,867,358 B2Xyleco, Inc. · 2011
- Method and apparatus for roll profile measurement61US 5,048,353 ABeloit Corporation · 1991