Pumpable mine ventilation structure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 5, 2015
Issued Date -
N/A
app pub date -
Feb 7, 2014
filing date -
Apr 19, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls are closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.
First Claim
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International Classification(s)
- 2014 Application Filing Year
- E21F Class
- 52 Applications Filed
- 44 Patents Issued To-Date
- 84.62 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- E21F Class
- 15 % this patent is cited more than
- 10 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 | Nov 5, 2026 |
