Expired European patentEurope
Combustion inhibitors based on fiber containing oxygenated polyurethane elastomers for double base propellants
EP 0116795 B1 · Applicant: SOCIETE NATIONALE DES POUDRES ET EXPLOSIFS
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 December 8, 1983 and granted July 23, 1986. A European patent lasts at most 20 years from filing, so its term ended December 8, 2003.
- 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 June 8, 2009.
- 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.
FiledDecember 8, 1983
PublishedAugust 29, 1984
GrantedJuly 23, 1986
Term endedDecember 8, 2003
Application numberEP 83402373
Classification (CPC)C06B45/12
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.