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Expired European patentEurope

Novel process for making n-butyl butyrate

EP 0111684 B1 · Applicant: CPC INTERNATIONAL INC.

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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 25, 1983 and granted January 21, 1987. A European patent lasts at most 20 years from filing, so its term ended October 25, 2003.
  • 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 25, 2009.
  • 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 25, 1983
PublishedJune 27, 1984
GrantedJanuary 21, 1987
Term endedOctober 25, 2003
Application numberEP 83110650
Classification (CPC)C12P7/62

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedOct 25, 1983PublishedJune 27, 1984Patent grantedJan 21, 1987Term endedOct 25, 2003

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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