Telescopic mine roof support
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 7, 2014
Grant Date -
Mar 6, 2014
app pub date -
Aug 30, 2012
filing date -
Aug 30, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A longitudinally yieldable support for underground roof support includes a first support section with a first elongate outer shell filled with a solid compressible filler material and a second support section filled with a second solid compressible filler material with a second elongate outer shell extending above the first elongate outer shell. The second support section has density that is greater than a density of the first solid compressible filler material. A pair of attachment members are coupled to the second elongate outer shell and are configured for lifting the second elongate outer shell relative to the first elongate outer shell and for securing the second elongate outer shell relative to the first elongate outer shell once lifted.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- E21D Class
- 67 Applications Filed
- 57 Patents Issued To-Date
- 85.08 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 6 Citation Count
- E21D Class
- 11.11 % this patent is cited more than
- 11 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 | Apr 7, 2026 |
