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Expired European patentEurope

Method of purifying ammonium fluoride solutions

EP 0002016 B1 · Applicant: BAYER AG

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 November 4, 1978 and granted September 3, 1980. A European patent lasts at most 20 years from filing, so its term ended November 4, 1998.
  • 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 May 4, 2004.
  • 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.
FiledNovember 4, 1978
PublishedMay 30, 1979
GrantedSeptember 3, 1980
Term endedNovember 4, 1998
Application numberEP 78101308
Classification (CPC)C01C1/162 +1 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedNov 4, 1978PublishedMay 30, 1979Patent grantedSep 3, 1980Term endedNov 4, 1998

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.