Mixture for the production of an amber glass, amber glass, method for the production of tubes and blanks of tinted bulbs, and tinted bulbs obtained with said glass
CA 2551667 C · Owner: Vermont · Inventors: Lefevre, Christian; Lepesqueux, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a mixture for the production of a vat-dyed amber glass; an amber glass formed from the vitrifiable mixture based on a silico-sodo-calcic composition; and a method for the production of tubes and blanks (2) for bulbs (1) using said glass. The mixture contains 100 % by weight of the following ingredients: 0.01 % - 1 % by weight molybdenum bisulphur and 0. 01 % - 7 % strontium sulphur by weight. The glass thus obtained is devoid of harmful products such as cadmium and no additional heat treatment is required in order to obtain the desired colour thereof.
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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
- Filed December 24, 2004 and granted September 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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
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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.