Method and apparatus for applying rock dust to a mine wall
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 11, 2018
Grant Date -
Oct 24, 2013
app pub date -
Jan 8, 2013
filing date -
Jan 12, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Loading Importance Indicators... 
Abstract
Rock dust is applied to a mine wall for mine fire suppression in combination with a chemical foam, by generating the foam from air and a foamable liquid in a mixing chamber, and delivering the foam through one flexible conduit and air-entrained rock dust through another flexible conduit to a portable assembly composed of a Y-joint and a delivery nozzle for combining the foam and rock dust and applying the combination directly to a mine wall.
First Claim
Other Claims data not available
Family
Loading Family data...
International Classification(s)
- 2013 Application Filing Year
- E21F Class
- 44 Applications Filed
- 39 Patents Issued To-Date
- 88.64 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E21F Class
- 0 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 11, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 11, 2030 |
