Expired European patentEurope
Double base propellant compositions
EP 0133798 B1 · Applicant: Royal Ordnance plc
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 August 2, 1984 and granted July 22, 1987. A European patent lasts at most 20 years from filing, so its term ended August 2, 2004.
- 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 February 2, 2010.
- 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.
FiledAugust 2, 1984
PublishedMarch 6, 1985
GrantedJuly 22, 1987
Term endedAugust 2, 2004
Application numberEP 84305259
Classification (CPC)C06B23/007
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.