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Expired European patentEurope

Use of polyurea-modified polyetherurethanes as an emulsion-breaker

EP 0281801 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 February 16, 1988 and granted January 23, 1991. A European patent lasts at most 20 years from filing, so its term ended February 16, 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 August 16, 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.
FiledFebruary 16, 1988
PublishedSeptember 14, 1988
GrantedJanuary 23, 1991
Term endedFebruary 16, 2008
Application numberEP 88102223
Classification (CPC)C08G18/10 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedFeb 16, 1988PublishedSep 14, 1988Patent grantedJan 23, 1991Term endedFeb 16, 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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