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Expired European patentEurope

Method for the thermal treatment of fine solid particles

EP 0051540 B1 · Applicant: TUNZINI-NESSI ENTREPRISES D'EQUIPEMENTS

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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 29, 1981 and granted December 14, 1983. A European patent lasts at most 20 years from filing, so its term ended October 29, 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 29, 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 29, 1981
PublishedMay 12, 1982
GrantedDecember 14, 1983
Term endedOctober 29, 2001
Application numberEP 81401731
Classification (CPC)F28D19/02 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedOct 29, 1981PublishedMay 12, 1982Patent grantedDec 14, 1983Term endedOct 29, 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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