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Expired European patentEurope

Process for the generation of alpha,beta-unsaturated carboxylic acids and esters using niobium catalyst

EP 1071652 B1 · Applicant: EASTMAN CHEMICAL 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, 1999 and granted June 15, 2005. A European patent lasts at most 20 years from filing, so its term ended April 15, 2019.
  • 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, 2024.
  • 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, 1999
PublishedJanuary 31, 2001
GrantedJune 15, 2005
Term endedApril 15, 2019
Application numberEP 99918584
Classification (CPC)C07C51/353 +1 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedApril 15, 1999PublishedJan 31, 2001Patent grantedJune 15, 2005Term endedApril 15, 2019

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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