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Expired European patentEurope

Aryl ester of perfluoroalkane-sulphonic acid as an antidripping agent in flame-resistant compositions based on thermoplastic aromatic polycarbonates

EP 0170851 B1 · Applicant: BAYER AG

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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 June 24, 1985 and granted September 9, 1987. A European patent lasts at most 20 years from filing, so its term ended June 24, 2005.
  • 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 24, 2010.
  • 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 24, 1985
PublishedFebruary 12, 1986
GrantedSeptember 9, 1987
Term endedJune 24, 2005
Application numberEP 85107791
Classification (CPC)C08K5/42

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJune 24, 1985PublishedFeb 12, 1986Patent grantedSep 9, 1987Term endedJune 24, 2005

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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