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Expired European patentEurope

Halogenated, tertiary diisocyanates and process for their preparation

EP 0057772 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 December 23, 1981 and granted March 13, 1985. A European patent lasts at most 20 years from filing, so its term ended December 23, 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 June 23, 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.
FiledDecember 23, 1981
PublishedAugust 18, 1982
GrantedMarch 13, 1985
Term endedDecember 23, 2001
Application numberEP 81110722
Classification (CPC)C07C263/16 +2 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedDec 23, 1981PublishedAug 18, 1982Patent grantedMarch 13, 1985Term endedDec 23, 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

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