WEAK ACID STRONG BASE AMPHOTERIC ADSORPTIVE RESINS AND THE PROCESS OF SEPARATION AND PURIFICATION OF CITRIC ACID

Details for Australian Patent Application No. 2002306265 (hide)

Owner PENG, Qijun YU, Zheng

Inventors PENG, Qijun

Pub. Number AU-A-2002306265

PCT Number PCT/CN02/00336

PCT Pub. Number WO2003/051808

Priority 01138018.7 19.12.01 CN

Filing date 20 May 2002

Wipo publication date 30 June 2003

International Classifications

C07C 051/42 Preparation of carboxylic acids or their salts, halides, or anhydrides - Separation

C07C 059/265 Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O-metal, CHO, keto, ether, groups, groups, or groups

C07C 051/47 Preparation of carboxylic acids or their salts, halides, or anhydrides

C07C 051/00 Preparation of carboxylic acids or their salts, halides, or anhydrides

Event Publications

19 December 2002 Complete Application Filed

  Priority application(s): 01138018.7 19.12.01 CN

28 August 2003 Application Open to Public Inspection

  Published as AU-A-2002306265

16 September 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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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