Expired European patentEurope
Method for guiding a digging tool during the excavation of a trench wall, and digging tool to be used in the method
EP 0509934 B1 · Applicant: SONDAGES INJECTIONS FORAGES "S.I.F." ENTREPRISE BACHY Société Anonyme dite:
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.
Why it's free to use
- Filed April 17, 1992 and granted March 22, 1995. A European patent lasts at most 20 years from filing, so its term ended April 17, 2012.
- 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 October 17, 2017.
- 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.
FiledApril 17, 1992
PublishedOctober 21, 1992
GrantedMarch 22, 1995
Term endedApril 17, 2012
Application numberEP 92401097
Classification (CPC)E02F3/26 +2 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.