Luminescent screen
CA 1089641 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Spijkerman, Leopold B.A.; Radielovic, Dragutin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A luminescent alkaline earth borate activated by bivalent europium of the formula Sr1-x-pMoxEupB4O7 where Me represents at least one of the elements bariu and magnesium and where 0 < x ? 0.25 and 0.003 ? p ? 0 The luminescent borate omits in a narrow band with a maximum at 368 nm and may be used in low-pressure mercury vapor discharge lamps.
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
- Granted November 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 1997.
- 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.