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Canadian application, no grantCanada

Method for predicting and optimizing the acoustical properties of homogeneous porous material

CA 2290523 A1 · Owner: Purdue Research Foundation · Inventors: Katragadda, Srinivas; Lai, Heng-Yi; Alexander, Jonathan H.

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Abstract From the Canadian patent

A computer controlled method for predicting acoustical properties for a generally homogeneous porous material includes providing at least one prediction model for determining one or more acoustical properties of homogeneous porous materials, providing a selected prediction model for use in predicting acoustical properties for the generally homogeneous porous material, and providing an input set of at least microstructural parameters corresponding to the selection model. One or more macroscopic properties for the homogeneous porous material are determined based on the input set of the microstructural parameters and acoustical properties for the homogeneous porous material are …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed May 15, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 15, 1998
GrantedNo grant recorded
Term endedMay 15, 2018
Patent numberCA 2290523 A1
Classification (IPC)G10K11/16

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedMay 15, 1998Term endedMay 15, 2018

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.