E21F 5/12
Composition of rock dust
E21F5/12 (Composition of rock dust) appears on 10 US grants and 17 published applications in this corpus.
Search patents in E21F- Granted patents
- 10
- Published applications
- 17
- Assignees
- 15
- Inventors
- 31
- Latest grant
- 23 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 3 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 3 |
| 2016 | 1 | 1 |
| 2017 | 2 | 2 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 2 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year.
Recent patents
- Non-caking mine rock dust for use in underground coal mines23 Aug 2022US 11,421,531 B2Imerys USA, Inc.
- Mine safety dust and method of production14 Jun 2022US 11,359,491 B1E. Dillon & Company
- Moisture tolerant rock dust and methods of application thereof7 Sep 2021US 11,111,786 B2Imerys USA, Inc.
- Mine safety dust and method of production1 Jun 2021US 11,021,956 B1E. Dillon & Company
- Non-caking mine rock dust for use in underground coal mines14 Jan 2020US 10,533,417 B2Imerys USA, Inc.
- Process for obtaining ore dust suppressant resin, ores dust suppressant resin, process for inhibition of ore particulate emission and resin use1 May 2025US 2025/0136855 A1Universidade Federal Do Espírito Santo—UFES
- Sprayable foamed rock dust composition and method of using the same13 Aug 2020US 2020/0254291 A1Allied Foam Tech Corp.
- Non-caking mine rock dust for use in underground coal mines9 Apr 2020US 2020/0109629 A1Imerys USA, Inc.
- Process for obtaining ore dust suppressant resin, ores dust suppressant resin, process for inhibition of ore particulate emission and resin use11 Oct 2018US 2018/0291246 A1Universidade Federal Do Espírito Santo—UFES
- Moisture tolerant rock dust and methods of application thereof10 Aug 2017US 2017/0226854 A1Imerys USA, Inc.
Most cited
By later US patents
- Method of dusting coal mine surfaces9US 6,726,849 B2Construction Research & Technology GmbH · 2004
- Non-caking rock dust for use in underground coal mines4US 9,631,492 B2Imerys USA, Inc. · 2017
- Non-caking mine rock dust for use in underground coal mines2US 10,533,417 B2Imerys USA, Inc. · 2020
- Aerated rock dust2US 9,458,718 B2Wright-Mix Material Solutions, LLC · 2016
- Freeze conditioning agents utilizing crude glycerin and flowback and produced water2US 9,683,153 B2Ecolab USA Inc. · 2017