Zirconia induction furnace
CA 1187290 A · Owner: Western Electric Company, Incorporated · Inventors: Andrejco, Matthew J.; Schroeder, Charles M. Jr.; Paek, Un C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract A high frequency induction furnace for reflowing a portion of a lightguide preform in order to draw a fiber therefrom. The furnace has a centrally located tubular susceptor therein having a thin coating of the preform material (e.g. silica) on at least a portion of the inside surface thereof. A cylinder is positioned in concentric spaced relation about the susceptor and is surrounded by an insulating grain. A high frequency coil is energized to couple its electromagnetic field to the susceptor to heat and reflow a portion of the preform in order to draw the fiber therefrom. The thin coating prevents contaminating particulates from migrating from small cracks in the inside surface …
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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
- Granted May 21, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 2002.
- 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.