Method and apparatus for applying rock dust to a mine wall
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United States of America Patent
Stats
-
Jan 5, 2016
Grant Date -
Apr 30, 2015
app pub date -
Oct 24, 2013
filing date -
Oct 24, 2013
priority date (Note) -
In Force
status (Latency Note)
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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 a suspension of rock dust in water through another flexible conduit to a combiner, and causing the combined foam, rock dust and water to pass through a flexible hose to a delivery nozzle from which it is applied to a mine wall.
First Claim
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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
- 2 Citation Count
- E21F Class
- 20.83 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 5, 2027 |
