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Expired European patentEurope

Process and catalyst system for the trimerization of acetylene and acetylene compounds

EP 0263259 B1 · Applicant: HÜLS 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 August 7, 1987 and granted June 19, 1991. A European patent lasts at most 20 years from filing, so its term ended August 7, 2007.
  • 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 February 7, 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.
FiledAugust 7, 1987
PublishedApril 13, 1988
GrantedJune 19, 1991
Term endedAugust 7, 2007
Application numberEP 87111457
Classification (CPC)C07C33/26 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedAug 7, 1987PublishedApril 13, 1988Patent grantedJune 19, 1991Term endedAug 7, 2007

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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