Method of bleaching a pulp

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United States of America Patent

PATENT NO	8257550
APP PUB NO	20110036524A1
SERIAL NO	12867985
DOCKET NO

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Sep 4, 2012
Grant Date
Feb 17, 2011
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Feb 12, 2009
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Feb 28, 2008

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Abstract

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Methods for bleaching oxygen delignified and washed pumps having a consistency of between 8 and 20% are disclosed including a first chlorine dioxide bleaching step, washing the bleached pulp, subjecting the washed pulp to an alkaline extraction step to obtain an alkali-containing pulp, adding chlorine dioxide and adjusting the pH in a second chlorine dioxide bleaching step performed directly after the alkaline extraction step without an intermediate washing step, and subjecting the bleached alkali-containing pulp to a peroxide treatment step directly after the second chlorine dioxide bleaching step or with an intermediate washing step prior to the peroxide treatment step.

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15 United States
10 France
8 Japan
7 China
5 Korea
2 Other

Patent Owner(s)

Patent Owner	Address
VALMET TECHNOLOGIES INC	02150 ESPOO

International Classification(s)

D21C:PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE ....

2009 Application Filing Year
D21C Class
70 Applications Filed
56 Patents Issued To-Date
80 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Dahl, Mårten	Ankarsvik, SE	1	1
# of filed Patents : 1 Total Citations : 1
Eriksson, Sara	Sundsvall, SE	1	1
# of filed Patents : 1 Total Citations : 1
Nordén, Solveig	Sundsvall, SE	1	1
# of filed Patents : 1 Total Citations : 1

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Fee	Large entity fee	small entity fee	micro entity fee	due date

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
September 04, 2012	US,8257550,B2 US8257550B2	GRANTED PATENT AS SECOND PUBLICATION
February 17, 2011	US,20110036524,A1 US20110036524A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8325390

System and method to cue operator response in a manually-driven document scanner

Abstract

A document scanner and associated feedback mechanism are disclosed. The document scanner includes a document bed including a document positioning surface, and a scanning module slidably connected to the document bed, the scanning module manually movable across the document positioning surface. The document scanner further includes a feedback mechanism arranged to receive information about a speed of movement of the scanning module, and output a feedback signal to a user of the document scanner.

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Method of bleaching a pulp

Number of patents in Portfolio can not be more than 2000

United States of America Patent

12867985

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12867985

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