E21F 15/005
Methods or devices for placing filling-up materials in underground workings: characterised by
Official title: {characterised by the kind or composition of the backfilling material}
E21F15/005 (Methods or devices for placing filling-up materials in underground workings: characterised by) appears on 49 US grants and 53 published applications in this corpus.
Search patents in E21F- Granted patents
- 49
- Published applications
- 53
- Assignees
- 49
- Inventors
- 215
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 2 |
| 2018 | 1 | 1 |
| 2019 | 0 | 6 |
| 2020 | 4 | 6 |
| 2021 | 4 | 9 |
| 2022 | 4 | 3 |
| 2023 | 7 | 6 |
| 2024 | 4 | 5 |
| 2025 | 2 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-concentration filling slurry of coal gangue and preparation method thereof9 Jun 2026US 12,649,887 B1Taiyuan University of Science and Technology
- Combined process of integrating stoping-backfilling and carbon storage13 Jan 2026US 12,523,152 B2Taiyuan University of Technology
- Coal-based solid waste transport and filling integrated machine mining system and method11 Nov 2025US 12,467,362 B2Anhui University of Science and Technology
- System and method for stabilizing a mine3 Jun 2025US 12,320,257 B2Drill Tech Drilling and Shoring, Inc.
- Cemented filling material with bionic structure and preparation method and application thereof27 Aug 2024US 12,071,375 B1China University of Mining and Technology
- Backfill material30 Jul 2026US 2026/0218614 A1Sika Technology AG
- High-concentration filling slurry of coal gangue and preparation method thereof11 Jun 2026US 2026/0159773 A1Taiyuan University of Science and Technology
- Method of filling abandoned mineshaft and concurrently mineralizing and sequestering co2 using solid waste slurries11 Jun 2026US 2026/0160165 A1Shanxi University
- Method of extracting ore using tunnel boring machine7 Aug 2025US 2025/0250897 A1Robbins Mining, Inc.
- Storage of organic material in bogs to reduce co2 in the atmosphere27 Mar 2025US 2025/0100030 A1Jarala AS
Most cited
By later US patents
- Binder for mine tailings75US 6,402,833 B1Lafarge Canada Inc. · 2002
- Cement compositions38US 4,481,037 AFosroc International Limited · 1984
- Method of preparing cementitious compositions for tunnel backfill21US 4,419,135 AMolecrete Corporation · 1983
- Method of making a building material21US 4,501,618 ARheinisch-Westfalisches Elektrizitatswerk AG · 1985
- Pretreatment of solid wastes, and wastes to be compacted, for introduction into underground salt cavities of salt caverns via a downpipe under the force of gravity18US 4,886,393 AWintershall Aktiengesellschaft · 1989