MEMBRANE SEPARATION DEVICE
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
N/A
app pub date -
Aug 23, 2013
filing date -
Feb 28, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A membrane separation device comprises a membrane unit that includes membrane modules piled in a direction of a depth of a biological reactor, an air diffusing member arranged below the membrane unit to diffuse air for cleaning membranes of the membrane unit and an air bubble group splitting member arranged between the membrane unit and the air diffusing member to split an air bubble group supplied from the air diffusing member into air bubble groups. The air bubble group splitting member has a diameter larger than that of the air diffusing member and is a three-dimensional obstruction member arranged in parallel with an axis of the air diffusing member. The air bubble group splitting member has a vertical cross section of which a lower part is projected downward, and has a vertical cross section of which an upper part is triangular and a lower part is semicircular.
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 | |
---|---|---|
MEIDENSHA CORPORATION | 1-1 OSAKI 2-CHOME SHINAGAWA-KU TOKYO 141-6029 |
International Classification(s)

- 2013 Application Filing Year
- C02F Class
- 1232 Applications Filed
- 1035 Patents Issued To-Date
- 84.01 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
LI, Tairi | Tokyo, JP | 1 | 0 |
# of filed Patents : 1 Total Citations : 0 | |||
NOGUCHI, Hiroshi | Tokyo, JP | 107 | 1105 |
# of filed Patents : 107 Total Citations : 1105 |
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Patent Citation Ranking
- 0 Citation Count
- C02F Class
- 0 % this patent is cited more than
- 11 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 13, 2025 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
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 |
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