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Expired European patentEurope

Injection moldable amide-imide polymers containing divalent aliphatic radicals derived from aliphatic diamines

EP 0043853 B1 · Applicant: AMOCO CORPORATION

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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 January 7, 1981 and granted November 13, 1985. A European patent lasts at most 20 years from filing, so its term ended January 7, 2001.
  • 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 July 7, 2006.
  • 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.
FiledJanuary 7, 1981
PublishedJanuary 20, 1982
GrantedNovember 13, 1985
Term endedJanuary 7, 2001
Application numberEP 81900594
Classification (CPC)C08G73/14

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedJan 7, 1981PublishedJan 20, 1982Patent grantedNov 13, 1985Term endedJan 7, 2001

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.