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Expired European patentEurope

Carrier sheets of paper and nitrocellulose bearing polyuridylic acid and polythymidylic acid residues and their use in the preparative recovery of mRNA

EP 0114527 B1 · Applicant: Wreschner, Daniel Hyam

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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 December 23, 1983 and granted May 16, 1990. A European patent lasts at most 20 years from filing, so its term ended December 23, 2003.
  • 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 June 23, 2009.
  • 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.
FiledDecember 23, 1983
PublishedAugust 1, 1984
GrantedMay 16, 1990
Term endedDecember 23, 2003
Application numberEP 83307945
Classification (CPC)C07H21/00 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 23, 1983PublishedAug 1, 1984Patent grantedMay 16, 1990Term endedDec 23, 2003

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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