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Expired European patentEurope

Method for the preparation of isocyanates by pyrolysis of urethanes

EP 0078005 B1 · Applicant: BASF Aktiengesellschaft

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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 20, 1982 and granted August 7, 1985. A European patent lasts at most 20 years from filing, so its term ended October 20, 2002.
  • 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 20, 2008.
  • 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 20, 1982
PublishedMay 4, 1983
GrantedAugust 7, 1985
Term endedOctober 20, 2002
Application numberEP 82109669
Classification (CPC)C07C263/04

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedOct 20, 1982PublishedMay 4, 1983Patent grantedAug 7, 1985Term endedOct 20, 2002

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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