Expired European patentEurope
Method for reducing the density of ammonium nitrate
EP 0514037 B1 · Applicant: ICI CANADA INC.
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 April 28, 1992 and granted January 8, 1997. A European patent lasts at most 20 years from filing, so its term ended April 28, 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 28, 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 28, 1992
PublishedNovember 19, 1992
GrantedJanuary 8, 1997
Term endedApril 28, 2012
Application numberEP 92303817
Classification (CPC)C06B31/28 +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.