E21D 17/00
Caps for supporting mine roofs
E21D17/00 (Caps for supporting mine roofs) appears on 17 US grants and 11 published applications in this corpus.
Search patents in E21D- Granted patents
- 17
- Published applications
- 11
- Assignees
- 19
- Inventors
- 63
- Latest grant
- 19 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 3 |
| 2022 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- E21D 17/02Cantilever extension or similar protecting devices4
- E21D 17/10Details of mine caps for engaging the tops of pit-props, with or4
- E21D 17/003Caps for supporting mine roofs: with essential hydraulic elements1
- E21D 17/01Caps for supporting mine roofs: characterised by the shape of the cap1
- E21D 17/006Caps for supporting mine roofs: characterised by the material0
Recent patents
- Method of treating tunnel collapse using pavilion support19 Apr 2022US 11,306,588 B2China Communications Construction Co., Ltd.
- Method of treating tunnel collapse with roof-contacted shield support15 Feb 2022US 11,248,464 B2China Communications Construction Co., Ltd.
- Grouting bolt-cable composite beam and supporting method for advanced support of fractured surrounding rock in deep coal mines3 Aug 2021US 11,078,791 B2Shandong University of Science and Technology
- Fiberglass roof and rib plate31 Jul 2018US 10,036,251 B2FCI Holdings Delaware, Inc.
- Ventilated mine roof support27 Feb 2018US 9,903,203 B2Burrell Mining Products, Inc.
- Method of treating tunnel collapse using pavilion support16 Dec 2021US 2021/0388724 A1China Communications Construction Co., Ltd.
- Method of treating tunnel collapse with roof-contacted shield support18 Nov 2021US 2021/0355828 A1China Communications Construction Co., Ltd.
- Grouting bolt-cable composite beam and supporting method for advanced support of fractured surrounding rock in deep coal mines25 Mar 2021US 2021/0087931 A1Shandong University of Science and Technology
- Method of mining single steeply-inclined thick coal seam23 Jan 2020US 2020/0024944 A1Shandong University of Science and Technology
- Ventilated mine roof support8 Jun 2017US 2017/0159433 A1Burrell Mining Products, Inc.
Most cited
By later US patents
- Ball-and-socket type connections for use with mining apparatus10US 4,004,771 AGewerkschaft Eisenhutte Westfalia · 1977
- Non-crosslinked polyether-ketones which can be processed by a thermoplastic method, and their preparation7US 4,645,819 ABASF SE · 1987
- Hydraulic roof-support frame4US 4,266,892 AHermann Hemscheidt Maschinenfabrik GmbH & Co. · 1981
- Fiberglass roof and rib plate3US 10,036,251 B2FCI Holdings Delaware, Inc. · 2018
- Telescopic support caps, e.g. for use in mining3US 3,991,577 AHeuilleres du Bassin de Lorraine · 1976