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Expired European patentEurope

Process for the purification of poly(arylene sulfides)

EP 0287948 B1 · Applicant: BAYER AG

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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 April 14, 1988 and granted June 10, 1992. A European patent lasts at most 20 years from filing, so its term ended April 14, 2008.
  • 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 14, 2013.
  • 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 14, 1988
PublishedOctober 26, 1988
GrantedJune 10, 1992
Term endedApril 14, 2008
Application numberEP 88105931
Classification (CPC)C08G75/0281

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedApril 14, 1988PublishedOct 26, 1988Patent grantedJune 10, 1992Term endedApril 14, 2008

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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