Expired European patentEurope
Device for arresting an explosion during the transfer of bulk explosives
EP 0206946 B1 · Applicant: Etablissement public dit: CHARBONNAGES DE FRANCE
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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.
Why it's free to use
- Filed June 24, 1986 and granted August 30, 1989. A European patent lasts at most 20 years from filing, so its term ended June 24, 2006.
- 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 24, 2011.
- 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 24, 1986
PublishedDecember 30, 1986
GrantedAugust 30, 1989
Term endedJune 24, 2006
Application numberEP 86401384
Classification (CPC)F42D1/10
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.