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Expired European patentEurope

Process for producing pure grade acrylic acid

EP 0770592 B1 · Applicant: ROHM AND HAAS COMPANY

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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 November 22, 1995 and granted July 19, 2000. A European patent lasts at most 20 years from filing, so its term ended November 22, 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 22, 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 22, 1995
PublishedMay 2, 1997
GrantedJuly 19, 2000
Term endedNovember 22, 2015
Application numberEP 95308363
Classification (CPC)C07C51/487 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedNov 22, 1995PublishedMay 2, 1997Patent grantedJuly 19, 2000Term endedNov 22, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.