Low-pressure discharge lamp
CA 2380761 A1 · Owner: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh · Inventors: Hoffmann, Roland; Stoll, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention discloses a low-pressure discharge lamp (1) having a discharge vessel (2) which contains mercury. To prevent mercury from being consumed a, reducing agent (20) is introduced into the discharge vessel (2), which reducing agent is such that it bonds oxygen in the temperature range between room temperature and temperatures up to 900°C and can reduce mercury oxide.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed April 4, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.