Explosive tube having air gap and method of blasting bedrock using same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 28, 2017
Grant Date -
Dec 29, 2016
app pub date -
Dec 9, 2014
filing date -
Dec 24, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An explosive tube having an air gap and a method of blasting bedrock using the same, comprising: a filling tube having a filling space which is to be filled with explosives; and an air tube, the upper part of which is connected with another tube to form an air gap space therein, and which has an insertion hole formed on the bottom of the air tube to introduce the explosives into the filling space, the air tube being integrally formed on the filling tube. A plurality of tubes filled with explosives are connected with each other and inserted into blasting holes formed through bedrock to break the bedrock by blasting the explosives. By forming an air gap in the upper part of the tube.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- F42D Class
- 58 Applications Filed
- 52 Patents Issued To-Date
- 89.66 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F42D Class
- 0 % this patent is cited more than
- 8 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 | May 28, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 28, 2029 |
