Compact low-pressure discharge lamp with firing aid
CA 2365456 A1 · Owner: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh · Inventors: Hilscher, Achim; Noll, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compact low-pressure discharge lamp with firing aid The compact low-pressure discharge lamp (1) has a wound tubular discharge vessel (2) with at least four straight tubes (6, 7) which are in a polygonal arrangement and, close to or at the ends of the straight tubes (6, 7), are connected by transverse connections (8, 10, 11) to form a single continuous discharge path which is closed off in a gastight manner. A coil spring (14) made from metal which runs, parallel to the tubes (6, 7) is arranged in the center of the cylindrical cavity (13) formed by the straight tubes (6, 7) of the discharge vessel (2). The coil spring (14) reduces the firing voltage required.
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 December 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2023.
- 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.