Expired European patentEurope
High-pressure discharge lamp with an auxiliary ignition electrode as well as circuitry and process for operation
EP 0868833 B1 · Applicant: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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 October 2, 1997 and granted January 2, 2002. A European patent lasts at most 20 years from filing, so its term ended October 2, 2017.
- 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 April 2, 2023.
- 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.
FiledOctober 2, 1997
PublishedOctober 7, 1998
GrantedJanuary 2, 2002
Term endedOctober 2, 2017
Application numberEP 97910250
Classification (CPC)H05B41/2881 +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.