D21G 1/0246
Hard rolls
Official title: {Hard rolls}
D21G1/0246 (Hard rolls) appears on 48 US grants and 32 published applications in this corpus.
Search patents in D21G- Granted patents
- 48
- Published applications
- 32
- Assignees
- 30
- Inventors
- 120
- Latest grant
- 11 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 4 |
| 2003 | 3 | 2 |
| 2004 | 3 | 2 |
| 2005 | 1 | 0 |
| 2006 | 2 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 3 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 2 |
| 2015 | 0 | 3 |
| 2016 | 3 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Smooth and low density paperboard structures and methods for manufacturing the same11 Jul 2023US 11,697,908 B2WestRock MWV, LLC
- Smooth and low density paperboard structures and methods for manufacturing the same5 Apr 2022US 11,293,142 B2WestRock MWV, LLC
- Roll and its use26 Jan 2021US 10,900,173 B2Valmet Technologies Oy
- Roller with coating26 Mar 2019US 10,240,291 B2Voith Patent GmbH
- Roll cover4 Dec 2018US 10,145,065 B2Voith Patent GmbH
- Collar for compressing sleeve on drum4 Jun 2026US 2026/0151982 A1Suominen Oyj
- A sleeve for a drum7 May 2026US 2026/0125836 A1Suominen Oyj
- Method and device for in place calender roller dent inspection and repair12 Mar 2026US 2026/0071384 A1Tesla, Inc.
- Filter For Smoking or Vaping Article Comprising a Smooth Paper30 Nov 2023US 2023/0383465 A1Mativ Holdings, Inc.
- Smooth and low density paperboard structures and methods for manufacturing the same25 Aug 2022US 2022/0267961 A1WestRock MWV, LLC
Most cited
By later US patents
- Composite machine roll and method of manufacture41US 5,324,248 AComposite Development Corporation · 1994
- Process for producing hard roll35US 5,091,027 AYamauchi Corporation · 1992
- Fiber-reinforced plastic cylinder with an outer wear-resistant layer of filler-containing plastic and a method for producing the same32US 5,387,172 ASigri Great Lakes Carbon GmbH · 1995
- Roller for pressure treatment of webs28US 5,257,965 ACerasiv GmbH Innovatives Keramik-Engineering · 1993
- Supercalendar roll with composite cover20US 6,375,602 B1SW Paper Inc. · 2002