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Expired European patentEurope

N-Chlorocarbonyloxy-5-norbornene-2,3-dicarboximide, process for its preparation and its use

EP 0134041 B1 · Applicant: Akademie der Wissenschaften der DDR

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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 23, 1984 and granted April 6, 1988. A European patent lasts at most 20 years from filing, so its term ended August 23, 2004.
  • 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 23, 2010.
  • 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 23, 1984
PublishedMarch 13, 1985
GrantedApril 6, 1988
Term endedAugust 23, 2004
Application numberEP 84110072
Classification (CPC)G01N33/54353 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedAug 23, 1984PublishedMarch 13, 1985Patent grantedApril 6, 1988Term endedAug 23, 2004

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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