Copper-and-zinc-activated strontium sulfide phosphors
CA 1067282 A · Owner: Rca Corporation · Inventors: Smith, Arthur L.; Shaffer, Donnavon D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Copper-and-zinc-activated strontium sulfide phosphors are both photoluminescent and cathodoluminescent. The incorporation of 0.001 to 0.100 mole zinc per mole strontium, shifts the emission peak of the phosphor from about 5280 angstroms for the zinc-free phosphor to about 5380 angstroms for the maximum amount of incorporated zinc. Up to 1000weight-part aluminum per million weight parts strontium sulfide may also be incorporated.
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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 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
- 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.