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Aromatic quaternary ammonium compounds, polymers thereof, polymerisable compositions containing them and methods of making the monomers and polymers

EP 0072159 A1 · Applicant: ROHM AND HAAS COMPANY

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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 July 30, 1982 and never granted as a European patent. Had it been granted, its 20-year term would have ended July 30, 2002.
  • 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 January 30, 2008.
  • 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.
FiledJuly 30, 1982
PublishedFebruary 16, 1983
GrantedNever granted
Term endedJuly 30, 2002
Application numberEP 82304031
Classification (CPC)C08F12/28

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJuly 30, 1982PublishedFeb 16, 1983Term endedJuly 30, 2002

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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