Expired European patentEurope
A fast frequency transformation techique for transform audio coders
EP 1057292 B1 · Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Overview
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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 February 21, 1998 and granted April 28, 2004. A European patent lasts at most 20 years from filing, so its term ended February 21, 2018.
- 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 August 21, 2023.
- 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.
FiledFebruary 21, 1998
PublishedDecember 6, 2000
GrantedApril 28, 2004
Term endedFebruary 21, 2018
Application numberEP 98909964
Classification (CPC)H04H20/89
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.