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Expired European patentEurope

Process and apparatus for the preparation and recovery of maleic anhydride

EP 0815098 B1 · Applicant: HUNTSMAN PETROCHEMICAL CORPORATION

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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 November 28, 1995 and granted April 21, 2004. A European patent lasts at most 20 years from filing, so its term ended November 28, 2015.
  • 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 May 28, 2021.
  • 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.
FiledNovember 28, 1995
PublishedJanuary 7, 1998
GrantedApril 21, 2004
Term endedNovember 28, 2015
Application numberEP 95944470
Classification (CPC)C07C51/573

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedNov 28, 1995PublishedJan 7, 1998Patent grantedApril 21, 2004Term endedNov 28, 2015

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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