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Expired European patentEurope

Muffler with acoustic absorption insert for limited clearance pneumatic device applications

EP 1183446 B1 · Applicant: 3M Innovative Properties Company

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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.

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Why it's free to use

  • Filed September 20, 1999 and granted November 16, 2005. A European patent lasts at most 20 years from filing, so its term ended September 20, 2019.
  • 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 March 20, 2025.
  • 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.
FiledSeptember 20, 1999
PublishedMarch 6, 2002
GrantedNovember 16, 2005
Term endedSeptember 20, 2019
Application numberEP 99951537
Classification (CPC)F01N1/082 +1 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedSep 20, 1999PublishedMarch 6, 2002Patent grantedNov 16, 2005Term endedSep 20, 2019

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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