Caustic solution treatment process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 28, 2006
Grant Date -
Dec 9, 2004
app pub date -
Jun 6, 2003
filing date -
Jun 6, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for treating a spent caustic solution having a pH greater than about 10.5 includes the steps of (a) lowering the pH of the caustic solution into the range of between about 10 to 10.5 to produce a pH-modified caustic solution; (b) oxidizing the pH-modified caustic solution until the solution to produce a non-sulfide reactive oxidized solution; and (c) lowering the pH of the oxidized solution to a pH less than 9.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
TRC ENVIRONMENTAL CORPORATION | 21 GRIFFIN ROAD NORTH WINDSOR CT 06095 |
International Classification(s)

- 2003 Application Filing Year
- C02F Class
- 701 Applications Filed
- 232 Patents Issued To-Date
- 33.10 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Chowdhury, Ajit K | Madison, WI | 20 | 230 |
# of filed Patents : 20 Total Citations : 230 | |||
Wilk, Sarah | Green Bay, WI | 1 | 12 |
# of filed Patents : 1 Total Citations : 12 |
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Patent Citation Ranking
- 4 Citation Count
- C02F Class
- 2.12 % this patent is cited more than
- 19 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
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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