Patent Yard Sign in
Expired European patentEurope

Process for modifying the cooling power of aqueous liquids for quenching metal alloys

EP 0321370 B1 · Applicant: SERVIMETAL

EPO PDF

Overview

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

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed December 15, 1988 and granted May 13, 1992. A European patent lasts at most 20 years from filing, so its term ended December 15, 2008.
  • 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 June 15, 2014.
  • 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.
FiledDecember 15, 1988
PublishedJune 21, 1989
GrantedMay 13, 1992
Term endedDecember 15, 2008
Application numberEP 88420422
Classification (CPC)C21D1/60

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedDec 15, 1988PublishedJune 21, 1989Patent grantedMay 13, 1992Term endedDec 15, 2008

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.