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Expired European patentEurope

Polymer blend films, their preparation and use

EP 0046071 B1 · Applicant: Smith and Nephew Associated Companies p.l.c.

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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 August 7, 1981 and granted March 21, 1984. A European patent lasts at most 20 years from filing, so its term ended August 7, 2001.
  • 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 February 7, 2007.
  • 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.
FiledAugust 7, 1981
PublishedFebruary 17, 1982
GrantedMarch 21, 1984
Term endedAugust 7, 2001
Application numberEP 81303615
Classification (CPC)C08L75/04 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedAug 7, 1981PublishedFeb 17, 1982Patent grantedMarch 21, 1984Term endedAug 7, 2001

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.