Fluorescent lamp of the exterior electrode type as well as radiation unit
CA 2225832 C · Owner: Yokokawa, Yoshihisa · Inventors: Tada, Motonori; Yoshioka, Masaki; Inoue, Masaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluorescent lamp has a glass tube with fluorescent material applied to its inside and is, hermetically filled with a suitable amount of rare gas in which in the axial , direction of the outside surface of the glass tube there is at least one pair of electrodes. An aperture is, provided for emission of the light to the outside and the lamp is characterized in that the, electrodes have at least partially translucent regions and reflector material is located in the, translucent regions.
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, 1997 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2019.
- 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.