D21G 1/002
Opening or closing mechanisms
Official title: {Opening or closing mechanisms; Regulating the pressure}
D21G1/002 (Opening or closing mechanisms) appears on 154 US grants and 49 published applications in this corpus.
Search patents in D21G- Granted patents
- 154
- Published applications
- 49
- Assignees
- 63
- Inventors
- 225
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 8 | 0 |
| 1991 | 10 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 4 |
| 2002 | 6 | 4 |
| 2003 | 8 | 3 |
| 2004 | 5 | 4 |
| 2005 | 2 | 6 |
| 2006 | 3 | 5 |
| 2007 | 5 | 1 |
| 2008 | 5 | 2 |
| 2009 | 3 | 3 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 0 |
| 2016 | 0 | 2 |
| 2017 | 2 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 1 |
| 2024 | 0 | 5 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Calender and method for treating web-like materials3 Mar 2026US 12,565,724 B2Futura S.P. A.
- Roller arrangement21 Nov 2023US 11,821,460 B2Matthews International Corporation
- Method and device for the treatment of a product web10 Jan 2023US 11,549,215 B2Andritz Kuesters GmbH
- Sensor roll29 Aug 2017US 9,745,698 B2Voith Patent GmbH
- Sealing strip for a paper, cardboard or tissue machine made from a plurality of materials18 Jul 2017US 9,708,768 B2Voith Patent GmbH
- Roll press apparatus for manufacturing electrode plates5 Feb 2026US 2026/0034575 A1Samsung SDI.Co., Ltd.
- Systems and Methods for the Compressing of Graphite19 Dec 2024US 2024/0416553 A1
- Electrode sheet manufacturing device12 Dec 2024US 2024/0408657 A1Prime Planet Energy & Solutions, Inc.
- Information providing apparatus, information providing method, and non-transitory computer readable recording medium12 Dec 2024US 2024/0410834 A1Yokogawa Electric Corporation
- Calender and method for treating web-like meterials16 May 2024US 2024/0158975 A1Futura S.P. A.
Most cited
By later US patents
- Dynamic nip pressure and temperature sensing system72US 5,562,027 AStowe Woodward Licensco, LLC · 1996
- Method and apparatus for roll profile measurement61US 5,048,353 ABeloit Corporation · 1991
- Method of adjusting the contact pressure of a rolling mill and apparatus for the performance thereof44US 4,074,624 AEscher Wyss Limited · 1978
- Calendar33US 4,498,383 AKleinewefers GmbH · 1985
- Method of compensating for the roll deflection in a calender32US 4,117,054 AOy Wiik & Hoglund AB · 1978