E21D 15/50
Component parts or details of props
Official title: Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence)
E21D15/50 (Component parts or details of props) appears on 49 US grants and 31 published applications in this corpus.
Search patents in E21D- Granted patents
- 49
- Published applications
- 31
- Assignees
- 42
- Inventors
- 124
- Latest grant
- 8 Feb 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 3 |
| 2014 | 1 | 4 |
| 2015 | 1 | 5 |
| 2016 | 2 | 0 |
| 2017 | 1 | 3 |
| 2018 | 2 | 0 |
| 2019 | 2 | 1 |
| 2020 | 2 | 4 |
| 2021 | 5 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Adjustable lattice girder8 Feb 2022US 11,242,750 B2FCI Holdings Delaware, Inc.
- Mine roof support, pre-installation assembly for same, and method of installation5 Oct 2021US 11,136,887 B2Burrell Mining Products, Inc.
- Underground support28 Sep 2021US 11,131,189 B2FCI Holdings Delaware, Inc.
- Top plate for cribbing stacks and associated methods25 May 2021US 11,015,316 B1Cleveland Reclaim Industries
- Hydraulic support monitoring support pose in real time based on inertia measurement unit and detection method thereof13 Apr 2021US 10,975,695 B2China University of Mining and Technology
- Support prop27 Mar 2025US 2025/0101869 A1Msp Mine Support Products (Pty) Ltd
- Improved prop assemblies25 Jul 2024US 2024/0247506 A1R.J. Goldspink Pty Limited
- Adjustable Lattice Girder27 May 2021US 2021/0156251 A1FCI Holdings Delaware, Inc.
- Hydraulic support monitoring support pose in real time based on inertia measurement unit and detection method thereof14 Jan 2021US 2021/0010373 A1China University of Mining and Technology
- Mine roof support, pre-installation assembly for same, and method of installation15 Oct 2020US 2020/0325776 A1Burrell Mining Products, Inc.
Most cited
By later US patents
- Water-based industrial fluids54US 4,257,902 ASinger & Hersch Industrial Development (Pty.) Ltd. · 1981
- Yieldable mine post having a double ball and socket configuration26US 5,538,364 A1996
- Continuously adjustable rescue strut25US 6,394,405 B1Para Tech Incorporated · 2002
- Pressure-limiting valve23US 4,660,595 AHermann Hemscheidt Maschinenfabrik GmbH & Co. · 1987
- Pressure relief valve16US 4,091,838 ADowty Mining Equipment Limited · 1978