E21F 15/02
Supporting means
Official title: Supporting means, e.g. shuttering, for filling-up materials
E21F15/02 (Supporting means) appears on 24 US grants and 21 published applications in this corpus.
Search patents in E21F- Granted patents
- 24
- Published applications
- 21
- Assignees
- 17
- Inventors
- 59
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 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 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 3 |
| 2019 | 0 | 2 |
| 2020 | 5 | 3 |
| 2021 | 3 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method and apparatus for use in stope backfill mining7 Oct 2025US 12,435,630 B2M2P Engineering Pty Ltd
- System and method for monitoring bearing compression rate of filler in coal mine gob area16 Aug 2022US 11,414,991 B2China University of Mining and Technology
- Method and an apparatus for creating a void for underground mining7 Sep 2021US 11,111,787 B2Moore Management Company Pty Ltd
- Filling mining method for fully-mechanized top coal caving working face29 Jun 2021US 11,047,236 B2Shandong University of Science and Technology
- Method of recovering room-and-pillar coal pillar by using external replacement supports1 Jun 2021US 11,021,954 B2China University of Mining and Technology
- Storable box-shaped casting and curing device for filler and casting and curing method for filler4 Sep 2025US 2025/0277450 A1Henan Sanruan Coal Seam Mining Engineering Technology Research Center
- Method and apparatus for use in stope backfill mining28 Dec 2023US 2023/0417142 A1M2P Engineering Pty Ltd
- Bulkhead for facilitating backfilling of a stope upon mining thereof1 Jun 2023US 2023/0167740 A1Innovative Blasting Technologies Pty Ltd
- System and method for monitoring bearing compression rate of filler in coal mine gob area9 Sep 2021US 2021/0277779 A1China University of Mining and Technology
- Filling mining method for fully-mechanized top coal caving working face11 Feb 2021US 2021/0040850 A1Shandong University of Science and Technology
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
- Inclined layered solid-filling mining method in ultrathick coal layer2US 9,494,037 B2China University of Mining and Technology · 2016