Layered sheet for gas supply in water treatment

Details for Australian Patent Application No. 2002334979 (hide)

Owner 3M INNOVATIVE PROPERTIES COMPANY

Inventors Spiewak, Brian E; Lakshmi, Brinda B; Holm, David R; Kirk, Seth M; Hester, Jonathan F; David, Moses M; Hall, Jerald W Jr

Agent Davies Collison Cave

Pub. Number AU-A-2002334979

PCT Number PCT/US02/32566

PCT Pub. Number WO2003/051782

Priority 10/017,632 14.12.01 US

Filing date 11 October 2002

Wipo publication date 30 June 2003

International Classifications

C02F 003/10 Biological treatment of water, waste water, or sewage - Packings

C02F 003/20 Biological treatment of water, waste water, or sewage - using diffusers

B32B 003/30 Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form - characterised by a layer formed with recesses or projections, e.g. grooved, ribbed

Event Publications

13 February 2003 Complete Application Filed

  Priority application(s): 10/017,632 14.12.01 US

28 August 2003 Application Open to Public Inspection

  Published as AU-A-2002334979

8 May 2008 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This application lapsed under section 142(2)(d). Examination has been requested or an examination report has issued for this application. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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