E21F 1/006
Ventilation at the working face of galleries or tunnels
Official title: {Ventilation at the working face of galleries or tunnels}
E21F1/006 (Ventilation at the working face of galleries or tunnels) appears on 8 US grants and 11 published applications in this corpus.
Search patents in E21F- Granted patents
- 8
- Published applications
- 11
- Assignees
- 12
- Inventors
- 46
- Latest grant
- 17 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 2 |
| 2022 | 0 | 0 |
| 2023 | 2 | 2 |
| 2024 | 2 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines17 Dec 2024US 12,168,932 B2China University of Mining and Technology, Beijing
- Methane watchdog system, a cost effective approach to longwall methane monitoring and control9 Jul 2024US 12,031,888 B2West Virginia University
- Kind of no-pillar and gob-side entry retaining mining and construction method without the mining area division5 Sep 2023US 11,746,654 B2Shandong University of Science and Technology
- Split air cabin ventilation system for construction of tunnel inclined shaft and ventilation method using same13 Jun 2023US 11,674,392 B2Chang An University
- Blowing curtain face ventilation system for extended cut mining using passive regulator26 Jan 2021US 10,900,357 B2University of Kentucky Research Foundation
- Negative Pressure Air-seal Induced System for Controlling Environment of Pipe Jacking Operation4 Jun 2026US 2026/0153029 A1China Mcc5 Group Corp. Ltd
- Three-Dimensional Ventilation Method And System For Mining By 110 Construction Method In Coal And Gas Outburst Mines8 Jun 2023US 2023/0175398 A1China University of Mining and Technology, Beijing
- A Kind of No-Pillar and Gob-Side Entry Retaining Mining and Construction Method without the Mining Area Division6 Apr 2023US 2023/0103613 A1Shandong University of Science and Technology
- Methane watchdog system, a cost effective approach to longwall methane monitoring and control11 Nov 2021US 2021/0348988 A1West Virginia University
- Split air cabin ventilation system for construction of tunnel inclined shaft and ventilation method using same8 Jul 2021US 2021/0207481 A1Chang An University
Most cited
By later US patents
- Longwall mine construction method N002US 10,494,924 B22019
- Underground ventilation apparatus and method1US 10,760,420 B2Polyvent PTY LTD · 2020
- Three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines1US 12,168,932 B2China University of Mining and Technology, Beijing · 2024
- Method for controlling longwall operations with incorporation of air-technology and climate-technology resources1US 8,380,345 B2RAG Aktiengesselschaft · 2013