Expired European patentEurope
Chlorine-free composite rocket propellant
EP 0553476 B1 · Applicant: HERCULES INCORPORATED
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 18, 1992 and granted June 4, 1997. A European patent lasts at most 20 years from filing, so its term ended December 18, 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 June 18, 2018.
- 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 18, 1992
PublishedAugust 4, 1993
GrantedJune 4, 1997
Term endedDecember 18, 2012
Application numberEP 92121582
Classification (CPC)C06B33/04 +1 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.