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Expired European patentEurope

Improved organo-A1-chloride catalyzed poly-n-butenes process

EP 0367385 B1 · Applicant: EXXON CHEMICAL PATENTS INC.

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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 August 30, 1989 and granted November 15, 1995. A European patent lasts at most 20 years from filing, so its term ended August 30, 2009.
  • 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 March 2, 2015.
  • 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.
FiledAugust 30, 1989
PublishedMay 9, 1990
GrantedNovember 15, 1995
Term endedAugust 30, 2009
Application numberEP 89308781
Classification (CPC)C08F240/00 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedAug 30, 1989PublishedMay 9, 1990Patent grantedNov 15, 1995Term endedAug 30, 2009

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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