E21D 23/0034
Comprising a goaf shield articulated to a base member
Official title: {comprising a goaf shield articulated to a base member}
E21D23/0034 (Comprising a goaf shield articulated to a base member) appears on 95 US grants and 18 published applications in this corpus.
Search patents in E21D- Granted patents
- 95
- Published applications
- 18
- Assignees
- 46
- Inventors
- 123
- Latest grant
- 12 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 12 | 0 |
| 1978 | 15 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 0 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 3 |
| 2012 | 0 | 2 |
| 2013 | 4 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 3 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 3 |
| 2024 | 2 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Mining shield base lift methods12 Nov 2024US 12,138,721 B2
- Mining shield base lift wear pad1 Oct 2024US 12,103,124 B2
- Mining shield base lift apparatuses and methods3 Oct 2023US 11,772,209 B1Swanson Industries, Inc.
- Mining rock deflector apparatus and method4 May 2021US 10,995,617 B2Swanson Industries, Inc.
- Roof support connector9 Feb 2021US 10,914,170 B2Joy Global Underground Mining LLC
- Underground mining system and method30 Jul 2026US 2026/0218612 A1
- Mining shield base lift methods21 Dec 2023US 2023/0405740 A1Swanson Industries, Inc.
- Mining shield base lift wear pad21 Dec 2023US 2023/0405741 A1Swanson Industries, Inc.
- Mining shield base lift apparatuses and methods26 Oct 2023US 2023/0339051 A1Swanson Industries, Inc.
- Mining rock deflector apparatus and method24 Dec 2020US 2020/0400020 A1Swanson Industries, Inc.
Most cited
By later US patents
- Assembly for preventing the fall of dust and debris in a mine18US 4,003,208 A1977
- Method for the controlled maintaining of a distance between the top canopy and the coal face in longwall mining operations14US 8,567,870 B2RAG Aktiengesselschaft · 2013
- Longwall mining system and archshield for mining tar sands, oil shales and the like13US 3,958,830 AWorld Oil Mining Ltd. · 1976
- Method for automatically producing a defined face opening in plow operations in coal mining13US 8,376,467 B2RAG Aktiengesellschaft · 2013
- Support assemblies for use in mine workings12US 4,048,804 AGewerkschaft Eisenhutte Westfalia · 1977