Fluorescent lamp with enhanced phosphor blend
CA 2108749 A1 · Owner: Pappalardo, Romano G. · Inventors: Pappalardo, Romano G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a fluorescent lamp a coating on the interior surface of the glass envelope comprises at least one layer of a quad-phosphor blend for a converting a substantial portion of said ultraviolet radiation to visible illumination having a white color wherein the combination of phosphors result in a predetermined color point from about 2700 to about 4200 K on or near the Planckian locus. The quad-phosphor blend comprises a blend of three phosphor components having a predetermined CRI and exhibiting a characteristic spectral power distribution and quantum yield. The components comprise a first green emitting phosphor component having a visible emission spectrum principally in the 500 to 570 nm …
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 October 19, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2015.
- 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.