Expired European patentEurope
Detection system for roll stabilized airship
EP 0448423 B1 · Applicant: AEROSPATIALE Société Nationale Industrielle
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 February 18, 1991 and granted December 21, 1994. A European patent lasts at most 20 years from filing, so its term ended February 18, 2011.
- 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 August 18, 2016.
- 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.
FiledFebruary 18, 1991
PublishedSeptember 25, 1991
GrantedDecember 21, 1994
Term endedFebruary 18, 2011
Application numberEP 91400422
Classification (CPC)F41G7/222 +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.