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Expired European patentEurope

Beneficial use of water in catalytic conversion of formamides to isocyanates

EP 0242203 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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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 April 15, 1987 and granted September 19, 1990. A European patent lasts at most 20 years from filing, so its term ended April 15, 2007.
  • 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 October 15, 2012.
  • 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.
FiledApril 15, 1987
PublishedOctober 21, 1987
GrantedSeptember 19, 1990
Term endedApril 15, 2007
Application numberEP 87303329
Classification (CPC)C07C263/12

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedApril 15, 1987PublishedOct 21, 1987Patent grantedSep 19, 1990Term endedApril 15, 2007

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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