Method for operating a glass melting furnace
CA 2005314 C · Owner: Zschocher, Hartmut · Inventors: Pieper, Helmut; Zschocher, Hartmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of operating a glass furnace especially for vitrification of ecologically hazardous waste materials such as asbestos or asbestos-containing demolition material sewage, sludge, varnish mud, ashes, filtering dust and the like and relates to the operation of a furnace with molten glass topped by a batch layer which contains the waste materials. The batch layer is fed from the outside into the interior of the furnace, and the required heat energy is produced by means of heating installations in the glass melting furnace. The molten glass produced from waste materials and admixtures is drawn from the furnace through an outlet. The method is characterized specifically by producing on the …
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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 12, 1989 and granted April 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2011.
- 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.