Electric lamp provided with an interference filter comprising alternating layers of silicon dioxide and niobium pentoxide
CA 1259097 A · Owner: Philips Electronics N.V. · Inventors: Kuus, Gijsbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The electric lamp according to the invention has a lamp vessel (1) of glass having an SiO2 content of at least 95 % by weight, in which an electric element (3) is arranged. The lamp vessel is coated with an interference filter (5) of alternating layers of SiO2 and Nb205.
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 September 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 5, 2006.
- 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.