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Expired European patentEurope

Improved method of forming a socket weld

EP 0035492 B1 · Applicant: COMBUSTION ENGINEERING, INC.

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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 June 28, 1979 and granted September 28, 1983. A European patent lasts at most 20 years from filing, so its term ended June 28, 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 December 28, 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.
FiledJune 28, 1979
PublishedSeptember 16, 1981
GrantedSeptember 28, 1983
Term endedJune 28, 1999
Application numberEP 79901508
Classification (CPC)B23K33/006

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedJune 28, 1979PublishedSep 16, 1981Patent grantedSep 28, 1983Term endedJune 28, 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.