Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozone

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5863389
SERIAL NO

08208063

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine. The bleaching reactor is a horizontal vessel having a central rotatable shaft which preferably contains paddles, cut and folded screw flights or a ribbon flight, to disperse and advance the pulp particles in a plug flow manner while contacting and mixing the pulp particles with a gaseous bleaching agent such as ozone for substantially uniform bleaching thereof.

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Patent Owner(s)

Patent OwnerAddress
UNION CAMP PATENT HOLDING INCWILMINGTON DE 19801

International Classification(s)

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  • 1994 Application Filing Year
  • D21C Class
  • 124 Applications Filed
  • 50 Patents Issued To-Date
  • 40.33 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances1994199519961997199819990255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Friend, William H Savannah, GA 14 120
Gandck, Thomas P Trenton, NJ 1 39
Pikulin, Michael A Bound Brook, NJ 18 215
White, David E Pennington, NJ 16 154

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Patent Citation Ranking

  • 39 Citation Count
  • D21C Class
  • 92.31 % this patent is cited more than
  • 26 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges336543101 - 1011 - 2021 - 3031 - 4051 - 6001020302.557.512.51517.522.52527.532.53537.540

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