Expired European patentEurope
Water in oil type emulsion explosive
EP 0317221 B1 · Applicant: NIPPON OIL AND FATS COMPANY, 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 November 11, 1988 and granted August 21, 1991. A European patent lasts at most 20 years from filing, so its term ended November 11, 2008.
- 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 May 11, 2014.
- 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.
FiledNovember 11, 1988
PublishedMay 24, 1989
GrantedAugust 21, 1991
Term endedNovember 11, 2008
Application numberEP 88310689
Classification (CPC)C06B47/145
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.