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Expired European patentEurope

Poly-alpha-olefin wax and process for preparing the same

EP 0321852 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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 December 15, 1988 and granted December 18, 1991. A European patent lasts at most 20 years from filing, so its term ended December 15, 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 June 15, 2014.
  • 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.
FiledDecember 15, 1988
PublishedJune 28, 1989
GrantedDecember 18, 1991
Term endedDecember 15, 2008
Application numberEP 88120951
Classification (CPC)C08F10/00 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedDec 15, 1988PublishedJune 28, 1989Patent grantedDec 18, 1991Term endedDec 15, 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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