Patent Yard Sign in
Expired European patentEurope

Alkylene oxide catalysts having enhanced activity and/or stability

EP 0393785 B1 · Applicant: UNION CARBIDE CHEMICALS AND PLASTICS COMPANY INC. (a New York corporation)

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed April 17, 1990 and granted January 11, 1995. A European patent lasts at most 20 years from filing, so its term ended April 17, 2010.
  • 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 17, 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.
FiledApril 17, 1990
PublishedOctober 24, 1990
GrantedJanuary 11, 1995
Term endedApril 17, 2010
Application numberEP 90200945
Classification (CPC)B01J27/053 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedApril 17, 1990PublishedOct 24, 1990Patent grantedJan 11, 1995Term endedApril 17, 2010

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.