METHODS TO ENHANCE PULP BLEACHING AND DELIGNIFICATION

Details for Australian Patent Application No. 2002250510 (hide)

Owner ONDEO NALCO COMPANY

Inventors DUGGIRALA, Prasad, Y.; SHEVCHENKO, Sergey, M.; SALMEN, Kristine, S.

Pub. Number AU-A-2002250510

PCT Pub. Number WO2002/088460

Priority 09/846,635 01.05.01 US

Filing date 3 April 2002

Wipo publication date 11 November 2002

International Classifications

D21C 003/20 Pulping cellulose-containing materials

D21C 009/147 After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters - with oxygen or its allotropic modifications

Event Publications

17 April 2003 Application Open to Public Inspection

  Published as AU-A-2002250510

19 February 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This application lapsed under section 142(2)(f)/See Reg. 8.3(3). Examination has not yet been requested or directed for this application. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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