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Expired European patentEurope

Halogenated tertiary alkyl isocyanates and process for their preparation

EP 0025907 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 September 3, 1980 and granted June 20, 1984. A European patent lasts at most 20 years from filing, so its term ended September 3, 2000.
  • 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 March 3, 2006.
  • 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.
FiledSeptember 3, 1980
PublishedApril 1, 1981
GrantedJune 20, 1984
Term endedSeptember 3, 2000
Application numberEP 80105232
Classification (CPC)C07C263/16 +2 more

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedSep 3, 1980PublishedApril 1, 1981Patent grantedJune 20, 1984Term endedSep 3, 2000

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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