Patent Yard Sign in
Expired European patentEurope

Apparatus for continuously machining helicoidal grooves in a cylindrical object

EP 0002976 B1 · Applicant: LIGNES TELEGRAPHIQUES ET TELEPHONIQUES L.T.T.

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 12, 1978 and granted March 10, 1982. A European patent lasts at most 20 years from filing, so its term ended December 12, 1998.
  • 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 12, 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.
FiledDecember 12, 1978
PublishedJuly 11, 1979
GrantedMarch 10, 1982
Term endedDecember 12, 1998
Application numberEP 78400233
Classification (CPC)H01B13/06 +2 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedDec 12, 1978PublishedJuly 11, 1979Patent grantedMarch 10, 1982Term endedDec 12, 1998

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.