High shear mixer and glass melting apparatus and method
CA 2105576 C · Owner: Stir-Melter, Inc. · Inventors: Richards, Ray S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A glass melter (30) having a mixing impeller (34) for converting a feed stream (38) supplied to a vessel (32) into a vitrified glass melt (50). Heating means such as electrodes (36) or a gas burner (58) are used to heat the glass melt (50). Electrode (36) arrangements are proposed for minimizing current flow through the impeller (34). Current flow through a special continuous circular impeller or conical pump (70) is disclosed. A cylindrical vessel (98) triangular vessel (94), square vessel (32) and hexagonal, vessel (96) are disclosed. Methods of processing particular waste streams are disclosed including coated mineral fibers fly ash, radioactive material, chemical waste and the like.
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
- Filed March 3, 1992 and granted June 11, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2014.
- 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.