Sound attenuator for low frequencies, method for manufacturing sound attenuator for low frequencies and system for attenuating low frequencies for ex- ample in air-conditioning ducts of paper mills

Details for Australian Patent Application No. 2009241983 (hide)

Owner Metso Paper, Inc.

Inventors Helenius, Kalle; Pettersson, Henrik

Agent Griffith Hack

Pub. Number AU-B-2009241983

PCT Pub. Number WO2009/133240

Priority 20085397 30.04.08 FI

Filing date 28 April 2009

Wipo publication date 5 November 2009

Acceptance publication date 14 June 2012

International Classifications

F24F 13/24 (2006.01) Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening

F16L 55/033 (2006.01) Devices or appurtenances for use in, or in connection with, pipes or pipe systems

G10K 11/172 (2006.01) Methods or devices for transmitting, conducting or directing sound in general

Event Publications

23 December 2010 PCT application entered the National Phase

  PCT publication WO2009/133240 Priority application(s): WO2009/133240

14 June 2012 Application Accepted

  Published as AU-B-2009241983

11 October 2012 Standard Patent Sealed

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