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Expired European patentEurope

Method of welding metal parts

EP 0005945 B1 · Applicant: GROOTCON (U.K.) LIMITED

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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 May 18, 1979 and granted August 5, 1981. A European patent lasts at most 20 years from filing, so its term ended May 18, 1999.
  • 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 November 18, 2004.
  • 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.
FiledMay 18, 1979
PublishedDecember 12, 1979
GrantedAugust 5, 1981
Term endedMay 18, 1999
Application numberEP 79300873
Classification (CPC)B23K9/23 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedMay 18, 1979PublishedDec 12, 1979Patent grantedAug 5, 1981Term endedMay 18, 1999

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.