Expired European patentEurope
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EP 0284651 B1 · Applicant: PIEPENBROCK PYROTECHNIK GMBH
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 September 24, 1987 and granted March 2, 1994. A European patent lasts at most 20 years from filing, so its term ended September 24, 2007.
- 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 March 24, 2013.
- 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.
FiledSeptember 24, 1987
PublishedOctober 5, 1988
GrantedMarch 2, 1994
Term endedSeptember 24, 2007
Application numberEP 87113942
Classification (CPC)F42B4/26
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.