E21D 15/486
With essential hydraulic or pneumatic details
Official title: {with essential hydraulic or pneumatic details}
E21D15/486 (With essential hydraulic or pneumatic details) appears on 4 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 4
- Published applications
- 6
- Assignees
- 6
- Inventors
- 21
- Latest grant
- 5 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year.
Recent patents
- Mine roof support, pre-installation assembly for same, and method of installation5 Oct 2021US 11,136,887 B2Burrell Mining Products, Inc.
- Telescopic mine roof support24 May 2016US 9,347,316 B2Burrell Mining Products, Inc.
- Telescopic pumpable props22 Sep 2015US 9,140,026 B2Cougar Can Company Pty Ltd.
- Telescopic mine roof support7 Oct 2014US 8,851,805 B2Burrell Mining Products, Inc.
- Self-stabilizing integrally-molded pillar filling structure for underground mines8 May 2025US 2025/0146414 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.
- Telescopic mine roof support24 Sep 2015US 2015/0267536 A1Burrell Mining Products, Inc.
- Telescopic Pumpable Props9 Apr 2015US 2015/0097099 A1Cougar Can Company Pty Ltd.
- Telescopic mine roof support6 Mar 2014US 2014/0064859 A1Burrell Mining Products, Inc.
Most cited
By later US patents