US Patent No: 8,225,942
Number of patents in Portfolio can not be more than 2000
Self-cleaning influent feed system for a wastewater treatment plant
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Jul 24, 2012
Issued date -
Jan 12, 2010
filing date -
12/685,875
serial no -
In Force
status
Importance
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Abstract
An influent feed system for directing the influent liquid via hydraulic energy to scour the surface of primary treatment tank walls and base to move the scoured solids to a sludge trough. Scouring action takes place during periods of low liquid levels in the tank. The system comprises two identical, adjacent tanks sharing a common distribution box. Either or both of the tanks are in use at any given time. The tank in use will be empty occasionally each day. Influent feed troughs disposed transversely in each tank directs solids towards a sludge hopper in the tank bottom. The IFTs extend over the width of the tank to provide scouring of the entire end wall and floor surface. Each IFT has a sump with a valved discharge piped directly to the sludge trough, and the floor of each IFT is sloped towards the sump to facilitates draining of solids.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 7,025,888 Floating decanter | 6 | 2002 | |
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| 4,693,821 Weir for waste water treatment systems | 15 | 1985 | |
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| 6,773,593 Continuous flow reactor wastewater treatment plant | 3 | 2002 | |
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| 5,503,747 Device for treating waste water especially rainwater | 12 | 1994 | |
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| 2009/0236,278 Decanter with swivel discharge pipe | 3 | 2007 | |
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| 5,435,924 Sludge collection apparatus and method | 14 | 1994 | |
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| 7,311,818 Water separation unit | 5 | 2006 | |
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| 5,587,067 Wastewater treatment apparatus | 10 | 1995 | |
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| 5,149,344 Multi-phase flow and separator | 28 | 1991 | |
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| 2010/0018,929 PRIMARY EQUALIZATION SETTLING TANK | 2 | 2008 | |
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| 4,891,128 Solids excluding surface skimmer | 13 | 1988 | |
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| 4,775,467 Reactor piping with pump column | 12 | 1987 | |
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| 2006/0008,865 Screening apparatus for water treatment with membranes | 5 | 2005 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jan 24, 2016 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 24, 2020 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 24, 2024 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |