Class E21F : SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Subclass 5/08: Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) Rock dusting; Depositing other protective substances
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11421531 | Non-caking mine rock dust for use in underground coal mines | Dec 05, 19 | Aug 23, 22 | Imerys USA, Inc. |
| 11111786 | Moisture tolerant rock dust and methods of application thereof | Oct 23, 15 | Sep 07, 21 | Imerys USA, Inc. |
| 10533417 | Non-caking mine rock dust for use in underground coal mines | Feb 14, 17 | Jan 14, 20 | Imerys USA, Inc. |
| 10371605 | Pneumatic mine dust sampling instrument | Oct 24, 16 | Aug 06, 19 | Not available |
| 9228435 | Method and apparatus for applying rock dust to a mine wall | Oct 24, 13 | Jan 05, 16 | Rusmar Incorporated |
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