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Expired European patentEurope

Process and device for optimal stud welding using tip starting

EP 0100787 B1 · Applicant: Hahn, Ortwin, Prof. Dr.-Ing.

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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 August 16, 1982 and granted January 7, 1988. A European patent lasts at most 20 years from filing, so its term ended August 16, 2002.
  • 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 February 16, 2008.
  • 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.
FiledAugust 16, 1982
PublishedFebruary 22, 1984
GrantedJanuary 7, 1988
Term endedAugust 16, 2002
Application numberEP 82107431
Classification (CPC)B23K9/201

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedAug 16, 1982PublishedFeb 22, 1984Patent grantedJan 7, 1988Term endedAug 16, 2002

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.