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Expired European patentEurope

A method for the continuous extrusion and blowing of thin films of plastics material, in particular rigid PVC

EP 0007286 B1 · Applicant: P.W.T. Plastic World Technology Limited

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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.

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Why it's free to use

  • Filed March 27, 1979 and granted December 5, 1984. A European patent lasts at most 20 years from filing, so its term ended March 27, 1999.
  • 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 September 27, 2004.
  • 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.
FiledMarch 27, 1979
PublishedJanuary 23, 1980
GrantedDecember 5, 1984
Term endedMarch 27, 1999
Application numberEP 79810028
Classification (CPC)B29C48/395 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedMarch 27, 1979PublishedJan 23, 1980Patent grantedDec 5, 1984Term endedMarch 27, 1999

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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