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Expired European patentEurope

Method for preparing aromatic polyesters, and device for implementing such method

EP 0054563 B1 · Applicant: ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft

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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 June 26, 1981 and granted August 29, 1984. A European patent lasts at most 20 years from filing, so its term ended June 26, 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 December 26, 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.
FiledJune 26, 1981
PublishedJune 30, 1982
GrantedAugust 29, 1984
Term endedJune 26, 2001
Application numberEP 81901816
Classification (CPC)C08G63/00 +2 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedJune 26, 1981PublishedJune 30, 1982Patent grantedAug 29, 1984Term endedJune 26, 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

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