Expired European patentEurope
Digital feed-forward active noise control system
EP 1074970 B1 · Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 2, 1996 and granted April 23, 2003. A European patent lasts at most 20 years from filing, so its term ended July 2, 2016.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by January 2, 2022.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJuly 2, 1996
PublishedFebruary 7, 2001
GrantedApril 23, 2003
Term endedJuly 2, 2016
Application numberEP 00122367
Classification (CPC)G10K11/17855 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.