Washing treatment system and washing treatment method for contaminated soil
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 12, 2022
Grant Date -
N/A
app pub date -
Jul 2, 2020
filing date -
Jul 2, 2020
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Abstract
A washing treatment system for contaminated soil, including: a classifier that is configured to obtain a sand fraction having a particle size within a predetermined range and a fine-grained fraction having a particle size smaller than the predetermined range, from contaminated soil containing one or more contaminants selected from dioxins and agricultural chemicals; a detaching/washing unit that is configured to detach a contaminant particle containing the from a surface of the sand fraction; a removal unit that is configured to generate air bubbles in a presence of water containing a flotation chemical, allows the detached contaminant-bearing particles to attach to the air bubbles to form froth, and removes the froth to obtain a first slurry containing primary purified soil; and an up-flow washing unit that is provided downstream of the removal unit, and is configured to supply the first slurry into up-flow water to purify the primary purified soil.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
SHIMIZU CORPORATION | 16-1 KYOBASHI 2-CHOME CHUO-KU TOKYO 104-8370 |
International Classification(s)

- 2020 Application Filing Year
- B03D Class
- 54 Applications Filed
- 29 Patents Issued To-Date
- 53.71 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Mouri, Mitsuo | Tokyo, JP | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 0 Citation Count
- B03D Class
- 0 % this patent is cited more than
- 3 Age
Forward Cite Landscape
- No Forward Cites to Display

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 12, 2026 |
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 12, 2030 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 12, 2034 |
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 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Jun 08, 2022 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2551); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY year of fee payment: 4 |
Dec 18, 2018 | P | Publication | |
Nov 28, 2018 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Apr 25, 2016 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JAIN, SANJAY;PAPAIOANNOU, IOANNIS;THOBHANI, SMITA;SIGNING DATES FROM 20070716 TO 20070717;REEL/FRAME:038377/0272 Owner name: LIPOXEN TECHNOLOGIES LIMITED, UNITED KINGDOM |
Apr 14, 2016 | P | Published | |
Dec 19, 2015 | F | Filing | |
Feb 23, 2005 | PD | Priority Date |

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