Expired European patentEurope
The electrical sequential initiation of explosions
EP 0251824 B1 · Applicant: GENERAL MINING UNION CORPORATION LIMITED
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 July 3, 1987 and granted October 31, 1990. A European patent lasts at most 20 years from filing, so its term ended July 3, 2007.
- 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 January 3, 2013.
- 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.
FiledJuly 3, 1987
PublishedJanuary 7, 1988
GrantedOctober 31, 1990
Term endedJuly 3, 2007
Application numberEP 87305934
Classification (CPC)F42D1/055
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.