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Expired European patentEurope

Method of purifying chlorosilanes

EP 0054650 B1 · Applicant: HÜLS TROISDORF AKTIENGESELLSCHAFT

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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 October 15, 1981 and granted January 29, 1986. A European patent lasts at most 20 years from filing, so its term ended October 15, 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 April 15, 2007.
  • 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.
FiledOctober 15, 1981
PublishedJune 30, 1982
GrantedJanuary 29, 1986
Term endedOctober 15, 2001
Application numberEP 81108342
Classification (CPC)C01B33/10778

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedOct 15, 1981PublishedJune 30, 1982Patent grantedJan 29, 1986Term endedOct 15, 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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