Sand boil filter with adjustable hydraulic head
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 5, 2023
Grant Date -
Mar 30, 2023
app pub date -
Sep 29, 2021
filing date -
Sep 29, 2021
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In one embodiment, a sand boil filter apparatus has a filter cone including an inner cone mesh and an outer cone mesh, the inner cone mesh having a finer mesh than the outer cone mesh. A filter tube extends through the hollow interior of the filter cone. The filter tube includes a lower portion disposed below the open apex. The filter tube includes an upper portion disposed above the open base. The upper portion has a plurality of sets of exit openings which are spaced along a length of the upper portion to provide different possible exit heights for the plurality of sets of exit openings, each set including one or more exit openings disposed at an exit height of the filter tube. An exit height adjustment tool blocks all of the exit openings disposed below a set of unblocked exit openings selected to provide a corresponding exit height.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2021 Application Filing Year
- E02D Class
- 385 Applications Filed
- 203 Patents Issued To-Date
- 52.73 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E02D Class
- 0 % this patent is cited more than
- 2 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Mar 5, 2027 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 5, 2031 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 5, 2035 |
