Patent Yard Sign in
Expired European patentEurope

Crosslinking of polymers containing diaryl ketones and the crosslinked polymers

EP 0532708 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY

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 May 31, 1991 and granted July 20, 1994. A European patent lasts at most 20 years from filing, so its term ended May 31, 2011.
  • 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 December 1, 2016.
  • 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.
FiledMay 31, 1991
PublishedMarch 24, 1993
GrantedJuly 20, 1994
Term endedMay 31, 2011
Application numberEP 91915821
Classification (CPC)C08G61/12

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedMay 31, 1991PublishedMarch 24, 1993Patent grantedJuly 20, 1994Term endedMay 31, 2011

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.