METHOD FOR PURIFYING AN ORGANIC SOLVENT FOR THE PURPOSE OF ABSORPTION OF MALEIC ACID ANHYDRIDE

Details for Australian Patent Application No. 2002316867 (hide)

Owner BASF AKTIENGESELLSCHAFT

Inventors RAHN, Ralf-Thomas; WECK, Alexander; KAIBEL, Gerd

Pub. Number AU-A-2002316867

PCT Number PCT/EP02/04414

PCT Pub. Number WO2002/085834

Priority 101 19 737.3 23.04.01 DE

Filing date 22 April 2002

Wipo publication date 5 November 2002

International Classifications

C07C 051/573 Preparation of carboxylic acids or their salts, halides, or anhydrides

C07C 051/215 Preparation of carboxylic acids or their salts, halides, or anhydrides

C07C 057/145 Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms

Event Publications

9 January 2003 Complete Application Filed

  Priority application(s): 101 19 737.3 23.04.01 DE

17 April 2003 Application Open to Public Inspection

  Published as AU-A-2002316867

19 February 2004 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired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