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Expired European patentEurope

Polymers and resins based on polyvinyl chloride being smooth grains with an internal structure of improved homogeneity and procedure of their preparation

EP 0481890 B1 · Applicant: ELF ATOCHEM S.A.

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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 October 16, 1991 and granted December 27, 1996. A European patent lasts at most 20 years from filing, so its term ended October 16, 2011.
  • 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 April 16, 2017.
  • 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.
FiledOctober 16, 1991
PublishedApril 22, 1992
GrantedDecember 27, 1996
Term endedOctober 16, 2011
Application numberEP 91402766
Classification (CPC)C08F214/06

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 16, 1991PublishedApril 22, 1992Patent grantedDec 27, 1996Term endedOct 16, 2011

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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