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Expired European patentEurope

An improved process for calcium hypochlorite production

EP 0086914 B1 · Applicant: OLIN 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 November 11, 1982 and granted October 23, 1985. A European patent lasts at most 20 years from filing, so its term ended November 11, 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 May 11, 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.
FiledNovember 11, 1982
PublishedAugust 31, 1983
GrantedOctober 23, 1985
Term endedNovember 11, 2002
Application numberEP 82305994
Classification (CPC)C01B11/064

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedNov 11, 1982PublishedAug 31, 1983Patent grantedOct 23, 1985Term endedNov 11, 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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