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Expired European patentEurope

Aromatic diisocyanates, process for their preparation and their use in the preparation of polyurethanes

EP 0001604 B1 · Applicant: BAYER AG

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Overview

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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 7, 1978 and granted July 23, 1980. A European patent lasts at most 20 years from filing, so its term ended October 7, 1998.
  • 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 7, 2004.
  • 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 7, 1978
PublishedMay 2, 1979
GrantedJuly 23, 1980
Term endedOctober 7, 1998
Application numberEP 78101099
Classification (CPC)C08G18/775

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedOct 7, 1978PublishedMay 2, 1979Patent grantedJuly 23, 1980Term endedOct 7, 1998

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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