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Expired European patentEurope

Control of carbon balance in a silicon smelting furnace by monitoring calcium

EP 0626344 B1 · Applicant: DOW CORNING CORPORATION

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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 April 27, 1994 and granted October 16, 1996. A European patent lasts at most 20 years from filing, so its term ended April 27, 2014.
  • 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 October 27, 2019.
  • 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.
FiledApril 27, 1994
PublishedNovember 30, 1994
GrantedOctober 16, 1996
Term endedApril 27, 2014
Application numberEP 94303036
Classification (CPC)C01B33/025

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedApril 27, 1994PublishedNov 30, 1994Patent grantedOct 16, 1996Term endedApril 27, 2014

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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