Luminescent material, luminescent screen provided with such a material and low-pressure mercury vapour discharge lamp provided with such a screen
CA 1137293 A · Owner: Koninklijke Philips Electronics N.V. · Inventors: De Hair, Johannes T.W.; Boogerd, Gert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A luminescant material whose host lattico comprises, as one of the main constituents at least, one of the elements Y, La and the lanthanides. The material is activated by Gd, and, in addition by one or more of the elements Pb, Tl, Sb, Pr and Bi and comprises one or more of the elemencs Mn, Tb Eu, Dy and, Sm as the third activator. Those materials have an efficient emission originating from the third activator and are used in low-pressure mercury vapour discharge lamps.
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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
- Granted December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.