E21C 37/18
Mining or quarrying: other methods or devices for dislodging with or without
Official title: by electricity
E21C37/18 (Mining or quarrying: other methods or devices for dislodging with or without) appears on 57 US grants and 55 published applications in this corpus.
Search patents in E21C- Granted patents
- 57
- Published applications
- 55
- Assignees
- 31
- Inventors
- 109
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 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 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 6 |
| 2007 | 0 | 2 |
| 2008 | 2 | 2 |
| 2009 | 3 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 2 |
| 2012 | 2 | 3 |
| 2013 | 3 | 6 |
| 2014 | 2 | 3 |
| 2015 | 4 | 1 |
| 2016 | 3 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 1 |
| 2019 | 2 | 4 |
| 2020 | 3 | 1 |
| 2021 | 1 | 2 |
| 2022 | 3 | 5 |
| 2023 | 2 | 4 |
| 2024 | 2 | 1 |
| 2025 | 5 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High power laser tunneling mining and construction equipment and methods of use25 Aug 2026US 12,715,063 B2Foro Energy, Inc.
- Electric-pulse fracturing device and method for hard roof of coal mine based on self-sealing water bag9 Dec 2025US 12,492,634 B2Taiyuan University of Technology
- Method and apparatus for using electro-magnetic radiation in narrow vein mining21 Oct 2025US 12,448,888 B2Sidney Resources Corporation
- Robust plasma blast probe tip27 May 2025US 12,312,956 B2Petram Technologies, Inc.
- Pulsed high-power drill bit and drilling tool29 Apr 2025US 12,286,881 B2I-Cube Research
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- Microwave-based mining systems and methods with robotic arm waveguide12 Mar 2026US 2026/0071543 A1Off-World, Inc.
- Microwave energy applicator23 Oct 2025US 2025/0327403 A1Off-World, Inc.
- Robust Plasma Blast Probe Apparatus and Method18 Sep 2025US 2025/0290414 A1Petram Technologies, Inc.
- Electric-pulse fracturing device and method for hard roof of coal mine based on self-sealing water bag15 May 2025US 2025/0154868 A1Taiyuan University of Technology
Most cited
By later US patents
- Portable electrohydraulic mining drill168US 5,896,938 ATetra Corporation · 1999
- Pulsed electric rock drilling apparatus80US 7,416,032 B2Tetra Corporation · 2008
- Method and apparatus for blasting hard rock79US 5,573,307 AMaxwell Laboratories, Inc. · 1996
- Method of drilling using pulsed electric drilling67US 7,530,406 B2Tetra Corporation · 2009
- Portable and directional electrocrushing drill64US 7,559,378 B2Tetra Corporation · 2009