Methods to enhance pulp bleaching and delignification

United States of America Patent

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Jun 12, 2007
Grant Date
Sep 8, 2005
app pub date
May 3, 2005
filing date
May 1, 2001

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Expired

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Abstract

A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed.A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and claimed.

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Patent Owner(s)

Patent Owner	Address
ECOLAB USA INC	1 ECOLAB PLACE SAINT PAUL MN 55102

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D21B:FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMEN....

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Inventor Name	Address	# of filed Patents	Total Citations
Duggirala, Prasad Y	Naperville, IL	40	275
Salmen, Kristine S	Naperville, IL	13	165
Shevchenko, Sergey M	Aurora, IL	29	276

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Methods to enhance pulp bleaching and delignification

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United States of America Patent

11121217

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PATENT NO	7229525
APP PUB NO	20050194111A1
SERIAL NO	11121217
DOCKET NO

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
June 12, 2007	US,7229525,B2 US7229525B2	GRANTED PATENT AS SECOND PUBLICATION
September 08, 2005	US,20050194111,A1 US20050194111A1	FIRST PUBLISHED PATENT APPLICATION

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