Expired European patentEurope
A device for cleaning electrodes in an electrostatic precipitator, an electrostatic precipitator making use of such devices and a method of cleaning the precipitator
EP 0659488 B1 · Applicant: SEVILLANA DE ELECTRICIDAD, S.A
Overview
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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, and the Claude kit works from them.
Why it's free to use
- Filed December 22, 1994 and granted March 17, 1999. A European patent lasts at most 20 years from filing, so its term ended December 22, 2014.
- 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 22, 2020.
- 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 22, 1994
PublishedJune 28, 1995
GrantedMarch 17, 1999
Term endedDecember 22, 2014
Application numberEP 94203731
Classification (CPC)B01D53/85
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.