E21F 15/04
Stowing mats
Official title: Stowing mats; Goaf wire netting; Partition walls
E21F15/04 (Stowing mats) appears on 11 US grants and 8 published applications in this corpus.
Search patents in E21F- Granted patents
- 11
- Published applications
- 8
- Assignees
- 8
- Inventors
- 19
- Latest grant
- 7 Sep 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 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 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 3 | 2 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and an apparatus for creating a void for underground mining7 Sep 2021US 11,111,787 B2Moore Management Company Pty Ltd
- Method for mining ultra-thick coal seam by utilizing goaf solid backfilling technique29 Dec 2020US 10,876,403 B2
- Roadway forming method by expanding excavating and filling gangue paste in thick coal seam29 Sep 2020US 10,787,906 B2Shandong University of Science and Technology
- Barricade wall3 Mar 2020US 10,577,932 B2Dkr Manufacturing Inc.
- Stope fill barrier25 Aug 2015US 9,115,582 B2
- Bulkhead for facilitating backfilling of a stope upon mining thereof1 Jun 2023US 2023/0167740 A1Innovative Blasting Technologies Pty Ltd
- Method for mining ultra-thick coal seam by utilizing goaf solid backfilling technique6 Feb 2020US 2020/0040727 A1
- Method of forming a roadway by filling gangue paste during wide-roadway excavation of thick coal seam6 Feb 2020US 2020/0040728 A1Shandong University of Science and Technology
- Barricade wall6 Dec 2018US 2018/0347360 A1Dkr Manufacturing Inc.
- Method and apparatus for creating a void for underground mining23 Aug 2018US 2018/0238171 A1Evolution Resource Group Pty Ltd
Most cited
By later US patents
- Inflatable envelope systems for use in excavations28US 3,937,025 A1976
- Form for making a permanent concrete mine stopping21US 5,167,474 AJohn Kennedy Metal Products & Buildings · 1992
- Inflatable envelope systems for use in excavations8US 4,056,939 A1977
- Mine roof support equipment4US 3,943,723 ACoal Industry (Patents) Limited · 1976
- Roadway forming method by expanding excavating and filling gangue paste in thick coal seam1US 10,787,906 B2Shandong University of Science and Technology · 2020