Expired European patentEurope
Positive fire indicator perforating system for wells
EP 0114103 B1 · Applicant: HALLIBURTON COMPANY
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 January 11, 1984 and granted October 28, 1987. A European patent lasts at most 20 years from filing, so its term ended January 11, 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 July 11, 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.
FiledJanuary 11, 1984
PublishedJuly 25, 1984
GrantedOctober 28, 1987
Term endedJanuary 11, 2004
Application numberEP 84300163
Classification (CPC)F42D5/02 +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.