Simultaneous ammonia and fluoride treatment for wastewater

United States of America Patent

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Nov 25, 2003
Grant Date
Oct 17, 2002
app pub date
Sep 21, 2001
filing date
Sep 26, 2000

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Expired

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Abstract

An improved method of treating wastewater to remove ammonia and fluoride is provided. The method comprises the steps of chemical destruction of ammonia with an oxidizing agent, followed by treatment with calcium salts to precipitate insoluble calcium fluoride, and filtration to remove the precipitate.

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Patent Owner(s)

Patent Owner	Address
IONICS INCORPORATED	65 GROVE STREET WATERTOWN MA 02172

International Classification(s)

C02F:TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE....

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Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Krulik, Gerald A	San Clemente, CA	35	1145

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Simultaneous ammonia and fluoride treatment for wastewater

Number of patents in Portfolio can not be more than 2000

United States of America Patent

09960640

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PATENT NO	6652758
APP PUB NO	20020148790A1
SERIAL NO	09960640
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
November 25, 2003	US,6652758,B2 US6652758B2	GRANTED PATENT AS SECOND PUBLICATION
October 17, 2002	US,20020148790,A1 US20020148790A1	FIRST PUBLISHED PATENT APPLICATION

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