E21F 17/16
Modification of mine passages or chambers for storage purposes, especially for liquids
Official title: Modification of mine passages or chambers for storage purposes, especially for liquids or gases (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00)
E21F17/16 (Modification of mine passages or chambers for storage purposes, especially for liquids) appears on 41 US grants and 26 published applications in this corpus.
Search patents in E21F- Granted patents
- 41
- Published applications
- 26
- Assignees
- 31
- Inventors
- 101
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 3 |
| 2015 | 0 | 3 |
| 2016 | 3 | 1 |
| 2017 | 4 | 0 |
| 2018 | 0 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 2 |
| 2021 | 4 | 1 |
| 2022 | 2 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 3 |
| 2025 | 2 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Combined process of integrating stoping-backfilling and carbon storage13 Jan 2026US 12,523,152 B2Taiyuan University of Technology
- Method and process for storing liquid and gaseous fluids under pressure in a vertical subsurface vessel2 Sep 2025US 12,404,972 B2
- Method for backfilling and reconstructing carbon storage space in abandoned main roadway and storing CO215 Jul 2025US 12,359,568 B2Taiyuan University of Technology
- Multi-energy complementary system for co-associated abandoned mine and use method23 Apr 2024US 11,965,419 B2Anhui University of Science and Technology
- Disposal of biomass waste20 Jun 2023US 11,679,424 B1B B & M Materials, LLC
- Graded underground pumped-storage hydropower in coal mine, construction and using methods12 Mar 2026US 2026/0071604 A1Taiyuan University of Technology
- Combined process of integrating stoping-backfilling and carbon storage31 Oct 2024US 2024/0360761 A1Taiyuan University of Technology
- Method for backfilling and reconstructing carbon storage space in abandoned main roadway and storing co231 Oct 2024US 2024/0360762 A1Taiyuan University of Technology
- Fluidized coal mining method for implementing co2 underground storage1 Feb 2024US 2024/0035382 A1China University of Mining and Technology, Beijing
- Method and Process for Storing Liquid and Gaseous Fluids Under Pressure in a Vertical Subsurface Vessel14 Sep 2023US 2023/0288025 A1
Most cited
By later US patents
- Process for excavating a cavity in a thin salt layer76US 5,957,539 AGaz De France (G. D. F.) Service National · 1999
- Horizontal natural gas storage caverns and methods for producing same62US 5,431,482 ASandia Corporation · 1995
- Safety device for underground storage of liquefied gas49US 4,417,829 ASociete Francaise de Stockage Geologique "Goestock" · 1983
- Lined cavity in the earth42US 4,239,416 APirelli Furlanis Applicazioni Indrauliche · 1980
- Constant-pressure air-storage cavern with hydralic pressure compensation for air-storage gas turbine power stations23US 4,454,721 ABBC Brown, Boveri & Company, Limited · 1984