E21C 41/26
Methods of surface mining
Official title: Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E21C47/00); Layouts therefor
E21C41/26 (Methods of surface mining) appears on 154 US grants and 137 published applications in this corpus.
Search patents in E21C- Granted patents
- 154
- Published applications
- 137
- Assignees
- 98
- Inventors
- 343
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 10 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 1 |
| 2004 | 1 | 6 |
| 2005 | 3 | 2 |
| 2006 | 2 | 2 |
| 2007 | 0 | 5 |
| 2008 | 1 | 3 |
| 2009 | 3 | 4 |
| 2010 | 0 | 8 |
| 2011 | 8 | 10 |
| 2012 | 2 | 9 |
| 2013 | 5 | 9 |
| 2014 | 8 | 9 |
| 2015 | 8 | 5 |
| 2016 | 3 | 3 |
| 2017 | 5 | 5 |
| 2018 | 5 | 7 |
| 2019 | 3 | 10 |
| 2020 | 12 | 8 |
| 2021 | 6 | 6 |
| 2022 | 2 | 2 |
| 2023 | 5 | 7 |
| 2024 | 4 | 7 |
| 2025 | 2 | 6 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Blasthole stemming based on formaldehyde resins, system and charging method6 Oct 2026US 12,754,001 B2Oxiquim S.A.
- Optimizing use of battery electric mine vehicles based on simulations22 Sep 2026US 12,743,909 B2Modular Mining Systems, Inc.
- Vehicle barrier system and method of construction thereof11 Aug 2026US 12,703,951 B2
- Methods and systems for mining16 Jun 2026US 12,654,962 B2Technological Resources Pty. Limited
- Method and system for mining23 Sep 2025US 12,421,802 B2Novamera Inc.
- Steep pit wall mining1 Oct 2026US 2026/0298083 A1
- Safe mining method for water-rich gently inclined coal seam3 Sep 2026US 2026/0258725 A1China University of Mining and Technology
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- Method and system for analysing ore4 Dec 2025US 2025/0369874 A1Anglo American Technical & Sustainability Services Ltd
- Method and System for Controlling a Plurality of Drill Rigs27 Nov 2025US 2025/0361775 A1Technological Resources Pty. Limited
Most cited
By later US patents
- Treatment of underground beds255US 4,442,896 A1984
- Heavy oil recovery process151US 4,160,479 A1979
- Method of determining a machine operation using virtual imaging69US 8,144,245 B2Caterpillar Inc. · 2012
- R.B. Jun's method of openwork mining utilizing pit wall consolidation39US 6,520,591 B12003
- Overburden removal method with blast casting and excavating apparatus32US 5,413,047 AAtlantic Richfield Company · 1995